21000913280

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^3\times {\mathrm{6679}}^1$

素因数の和:6749

約数の個数: 128

約数和(自身を含む): 53350488000

約数和(自身を除く): 32349574720

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 289, 320, 340, 544, 578, 640, 680, 1088, 1156, 1360, 1445, 2176, 2312, 2720, 2890, 4624, 4913, 5440, 5780, 6679, 9248, 9826, 10880, 11560, 13358, 18496, 19652, 23120, 24565, 26716, 33395, 36992, 39304, 46240, 49130, 53432, 66790, 78608, 92480, 98260, 106864, 113543, 133580, 157216, 184960, 196520, 213728, 227086, 267160, 314432, 393040, 427456, 454172, 534320, 567715, 628864, 786080, 854912, 908344, 1068640, 1135430, 1572160, 1816688, 1930231, 2137280, 2270860, 3144320, 3633376, 3860462, 4274560, 4541720, 7266752, 7720924, 9083440, 9651155, 14533504, 15441848, 18166880, 19302310, 30883696, 32813927, 36333760, 38604620, 61767392, 65627854, 72667520, 77209240, 123534784, 131255708, 154418480, 164069635, 247069568, 262511416, 308836960, 328139270, 525022832, 617673920, 656278540, 1050045664, 1235347840, 1312557080, 2100091328, 2625114160, 4200182656, 5250228320, 10500456640, 21000913280]

約数ペア:

[(1, 21000913280), (2, 10500456640), (4, 5250228320), (5, 4200182656), (8, 2625114160), (10, 2100091328), (16, 1312557080), (17, 1235347840), (20, 1050045664), (32, 656278540), (34, 617673920), (40, 525022832), (64, 328139270), (68, 308836960), (80, 262511416), (85, 247069568), (128, 164069635), (136, 154418480), (160, 131255708), (170, 123534784), (272, 77209240), (289, 72667520), (320, 65627854), (340, 61767392), (544, 38604620), (578, 36333760), (640, 32813927), (680, 30883696), (1088, 19302310), (1156, 18166880), (1360, 15441848), (1445, 14533504), (2176, 9651155), (2312, 9083440), (2720, 7720924), (2890, 7266752), (4624, 4541720), (4913, 4274560), (5440, 3860462), (5780, 3633376), (6679, 3144320), (9248, 2270860), (9826, 2137280), (10880, 1930231), (11560, 1816688), (13358, 1572160), (18496, 1135430), (19652, 1068640), (23120, 908344), (24565, 854912), (26716, 786080), (33395, 628864), (36992, 567715), (39304, 534320), (46240, 454172), (49130, 427456), (53432, 393040), (66790, 314432), (78608, 267160), (92480, 227086), (98260, 213728), (106864, 196520), (113543, 184960), (133580, 157216)]