19497760

素因数分解:

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

素因数の和:3977

約数の個数: 48

約数和(自身を含む): 47561472

約数和(自身を除く): 28063712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 3931, 4960, 7862, 15724, 19655, 31448, 39310, 62896, 78620, 121861, 125792, 157240, 243722, 314480, 487444, 609305, 628960, 974888, 1218610, 1949776, 2437220, 3899552, 4874440, 9748880, 19497760]

約数ペア:

[(1, 19497760), (2, 9748880), (4, 4874440), (5, 3899552), (8, 2437220), (10, 1949776), (16, 1218610), (20, 974888), (31, 628960), (32, 609305), (40, 487444), (62, 314480), (80, 243722), (124, 157240), (155, 125792), (160, 121861), (248, 78620), (310, 62896), (496, 39310), (620, 31448), (992, 19655), (1240, 15724), (2480, 7862), (3931, 4960)]