81389840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1439}}^1$

素因数の和:1560

約数の個数: 80

約数和(自身を含む): 218557440

約数和(自身を除く): 137167600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 101, 112, 140, 202, 280, 404, 505, 560, 707, 808, 1010, 1414, 1439, 1616, 2020, 2828, 2878, 3535, 4040, 5656, 5756, 7070, 7195, 8080, 10073, 11312, 11512, 14140, 14390, 20146, 23024, 28280, 28780, 40292, 50365, 56560, 57560, 80584, 100730, 115120, 145339, 161168, 201460, 290678, 402920, 581356, 726695, 805840, 1017373, 1162712, 1453390, 2034746, 2325424, 2906780, 4069492, 5086865, 5813560, 8138984, 10173730, 11627120, 16277968, 20347460, 40694920, 81389840]

約数ペア:

[(1, 81389840), (2, 40694920), (4, 20347460), (5, 16277968), (7, 11627120), (8, 10173730), (10, 8138984), (14, 5813560), (16, 5086865), (20, 4069492), (28, 2906780), (35, 2325424), (40, 2034746), (56, 1453390), (70, 1162712), (80, 1017373), (101, 805840), (112, 726695), (140, 581356), (202, 402920), (280, 290678), (404, 201460), (505, 161168), (560, 145339), (707, 115120), (808, 100730), (1010, 80584), (1414, 57560), (1439, 56560), (1616, 50365), (2020, 40292), (2828, 28780), (2878, 28280), (3535, 23024), (4040, 20146), (5656, 14390), (5756, 14140), (7070, 11512), (7195, 11312), (8080, 10073)]