646038640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:315

約数の個数: 160

約数和(自身を含む): 1684267200

約数和(自身を除く): 1038228560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 109, 130, 139, 164, 205, 208, 218, 260, 278, 328, 410, 436, 520, 533, 545, 556, 656, 695, 820, 872, 1040, 1066, 1090, 1112, 1390, 1417, 1640, 1744, 1807, 2132, 2180, 2224, 2665, 2780, 2834, 3280, 3614, 4264, 4360, 4469, 5330, 5560, 5668, 5699, 7085, 7228, 8528, 8720, 8938, 9035, 10660, 11120, 11336, 11398, 14170, 14456, 15151, 17876, 18070, 21320, 22345, 22672, 22796, 28340, 28495, 28912, 30302, 35752, 36140, 42640, 44690, 45592, 56680, 56990, 58097, 60604, 71504, 72280, 74087, 75755, 89380, 91184, 113360, 113980, 116194, 121208, 144560, 148174, 151510, 178760, 196963, 227960, 232388, 242416, 290485, 296348, 303020, 357520, 370435, 393926, 455920, 464776, 580970, 592696, 606040, 621191, 740870, 787852, 929552, 984815, 1161940, 1185392, 1212080, 1242382, 1481740, 1575704, 1969630, 2323880, 2484764, 2963480, 3105955, 3151408, 3939260, 4647760, 4969528, 5926960, 6211910, 7878520, 8075483, 9939056, 12423820, 15757040, 16150966, 24847640, 32301932, 40377415, 49695280, 64603864, 80754830, 129207728, 161509660, 323019320, 646038640]

約数ペア:

[(1, 646038640), (2, 323019320), (4, 161509660), (5, 129207728), (8, 80754830), (10, 64603864), (13, 49695280), (16, 40377415), (20, 32301932), (26, 24847640), (40, 16150966), (41, 15757040), (52, 12423820), (65, 9939056), (80, 8075483), (82, 7878520), (104, 6211910), (109, 5926960), (130, 4969528), (139, 4647760), (164, 3939260), (205, 3151408), (208, 3105955), (218, 2963480), (260, 2484764), (278, 2323880), (328, 1969630), (410, 1575704), (436, 1481740), (520, 1242382), (533, 1212080), (545, 1185392), (556, 1161940), (656, 984815), (695, 929552), (820, 787852), (872, 740870), (1040, 621191), (1066, 606040), (1090, 592696), (1112, 580970), (1390, 464776), (1417, 455920), (1640, 393926), (1744, 370435), (1807, 357520), (2132, 303020), (2180, 296348), (2224, 290485), (2665, 242416), (2780, 232388), (2834, 227960), (3280, 196963), (3614, 178760), (4264, 151510), (4360, 148174), (4469, 144560), (5330, 121208), (5560, 116194), (5668, 113980), (5699, 113360), (7085, 91184), (7228, 89380), (8528, 75755), (8720, 74087), (8938, 72280), (9035, 71504), (10660, 60604), (11120, 58097), (11336, 56990), (11398, 56680), (14170, 45592), (14456, 44690), (15151, 42640), (17876, 36140), (18070, 35752), (21320, 30302), (22345, 28912), (22672, 28495), (22796, 28340)]