19976840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{937}}^1$

素因数の和:1002

約数の個数: 64

約数和(自身を含む): 49638960

約数和(自身を除く): 29662120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 82, 104, 130, 164, 205, 260, 328, 410, 520, 533, 820, 937, 1066, 1640, 1874, 2132, 2665, 3748, 4264, 4685, 5330, 7496, 9370, 10660, 12181, 18740, 21320, 24362, 37480, 38417, 48724, 60905, 76834, 97448, 121810, 153668, 192085, 243620, 307336, 384170, 487240, 499421, 768340, 998842, 1536680, 1997684, 2497105, 3995368, 4994210, 9988420, 19976840]

約数ペア:

[(1, 19976840), (2, 9988420), (4, 4994210), (5, 3995368), (8, 2497105), (10, 1997684), (13, 1536680), (20, 998842), (26, 768340), (40, 499421), (41, 487240), (52, 384170), (65, 307336), (82, 243620), (104, 192085), (130, 153668), (164, 121810), (205, 97448), (260, 76834), (328, 60905), (410, 48724), (520, 38417), (533, 37480), (820, 24362), (937, 21320), (1066, 18740), (1640, 12181), (1874, 10660), (2132, 9370), (2665, 7496), (3748, 5330), (4264, 4685)]