19954240

素因数分解:

$2^6\times 5^1\times {\mathrm{127}}^1\times {\mathrm{491}}^1$

素因数の和:635

約数の個数: 56

約数和(自身を含む): 47987712

約数和(自身を除く): 28033472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 160, 254, 320, 491, 508, 635, 982, 1016, 1270, 1964, 2032, 2455, 2540, 3928, 4064, 4910, 5080, 7856, 8128, 9820, 10160, 15712, 19640, 20320, 31424, 39280, 40640, 62357, 78560, 124714, 157120, 249428, 311785, 498856, 623570, 997712, 1247140, 1995424, 2494280, 3990848, 4988560, 9977120, 19954240]

約数ペア:

[(1, 19954240), (2, 9977120), (4, 4988560), (5, 3990848), (8, 2494280), (10, 1995424), (16, 1247140), (20, 997712), (32, 623570), (40, 498856), (64, 311785), (80, 249428), (127, 157120), (160, 124714), (254, 78560), (320, 62357), (491, 40640), (508, 39280), (635, 31424), (982, 20320), (1016, 19640), (1270, 15712), (1964, 10160), (2032, 9820), (2455, 8128), (2540, 7856), (3928, 5080), (4064, 4910)]