20982832

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{359}}^1$

素因数の和:661

約数の個数: 40

約数和(自身を含む): 44059680

約数和(自身を除く): 23076848

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 281, 359, 562, 718, 1124, 1436, 2248, 2872, 3653, 4496, 4667, 5744, 7306, 9334, 14612, 18668, 29224, 37336, 58448, 74672, 100879, 201758, 403516, 807032, 1311427, 1614064, 2622854, 5245708, 10491416, 20982832]

約数ペア:

[(1, 20982832), (2, 10491416), (4, 5245708), (8, 2622854), (13, 1614064), (16, 1311427), (26, 807032), (52, 403516), (104, 201758), (208, 100879), (281, 74672), (359, 58448), (562, 37336), (718, 29224), (1124, 18668), (1436, 14612), (2248, 9334), (2872, 7306), (3653, 5744), (4496, 4667)]