81422320

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{20771}}^1$

素因数の和:20798

約数の個数: 60

約数和(自身を含む): 220224744

約数和(自身を除く): 138802424

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 20771, 41542, 83084, 103855, 145397, 166168, 207710, 290794, 332336, 415420, 581588, 726985, 830840, 1017779, 1163176, 1453970, 1661680, 2035558, 2326352, 2907940, 4071116, 5088895, 5815880, 8142232, 10177790, 11631760, 16284464, 20355580, 40711160, 81422320]

約数ペア:

[(1, 81422320), (2, 40711160), (4, 20355580), (5, 16284464), (7, 11631760), (8, 10177790), (10, 8142232), (14, 5815880), (16, 5088895), (20, 4071116), (28, 2907940), (35, 2326352), (40, 2035558), (49, 1661680), (56, 1453970), (70, 1163176), (80, 1017779), (98, 830840), (112, 726985), (140, 581588), (196, 415420), (245, 332336), (280, 290794), (392, 207710), (490, 166168), (560, 145397), (784, 103855), (980, 83084), (1960, 41542), (3920, 20771)]