77991040

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{3931}}^1$

素因数の和:3981

約数の個数: 64

約数和(自身を含む): 192510720

約数和(自身を除く): 114519680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3931, 3968, 4960, 7862, 9920, 15724, 19655, 19840, 31448, 39310, 62896, 78620, 121861, 125792, 157240, 243722, 251584, 314480, 487444, 503168, 609305, 628960, 974888, 1218610, 1257920, 1949776, 2437220, 2515840, 3899552, 4874440, 7799104, 9748880, 15598208, 19497760, 38995520, 77991040]

約数ペア:

[(1, 77991040), (2, 38995520), (4, 19497760), (5, 15598208), (8, 9748880), (10, 7799104), (16, 4874440), (20, 3899552), (31, 2515840), (32, 2437220), (40, 1949776), (62, 1257920), (64, 1218610), (80, 974888), (124, 628960), (128, 609305), (155, 503168), (160, 487444), (248, 314480), (310, 251584), (320, 243722), (496, 157240), (620, 125792), (640, 121861), (992, 78620), (1240, 62896), (1984, 39310), (2480, 31448), (3931, 19840), (3968, 19655), (4960, 15724), (7862, 9920)]