19752980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 48898080

約数和(自身を除く): 29145100

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 41, 52, 65, 68, 82, 85, 109, 130, 164, 170, 205, 218, 221, 260, 340, 410, 436, 442, 533, 545, 697, 820, 884, 1066, 1090, 1105, 1394, 1417, 1853, 2132, 2180, 2210, 2665, 2788, 2834, 3485, 3706, 4420, 4469, 5330, 5668, 6970, 7085, 7412, 8938, 9061, 9265, 10660, 13940, 14170, 17876, 18122, 18530, 22345, 24089, 28340, 36244, 37060, 44690, 45305, 48178, 58097, 75973, 89380, 90610, 96356, 116194, 120445, 151946, 181220, 232388, 240890, 290485, 303892, 379865, 481780, 580970, 759730, 987649, 1161940, 1519460, 1975298, 3950596, 4938245, 9876490, 19752980]

約数ペア:

[(1, 19752980), (2, 9876490), (4, 4938245), (5, 3950596), (10, 1975298), (13, 1519460), (17, 1161940), (20, 987649), (26, 759730), (34, 580970), (41, 481780), (52, 379865), (65, 303892), (68, 290485), (82, 240890), (85, 232388), (109, 181220), (130, 151946), (164, 120445), (170, 116194), (205, 96356), (218, 90610), (221, 89380), (260, 75973), (340, 58097), (410, 48178), (436, 45305), (442, 44690), (533, 37060), (545, 36244), (697, 28340), (820, 24089), (884, 22345), (1066, 18530), (1090, 18122), (1105, 17876), (1394, 14170), (1417, 13940), (1853, 10660), (2132, 9265), (2180, 9061), (2210, 8938), (2665, 7412), (2788, 7085), (2834, 6970), (3485, 5668), (3706, 5330), (4420, 4469)]