641956120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1234531}}^1$

素因数の和:1234555

約数の個数: 32

約数和(自身を含む): 1555510320

約数和(自身を除く): 913554200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1234531, 2469062, 4938124, 6172655, 9876248, 12345310, 16048903, 24690620, 32097806, 49381240, 64195612, 80244515, 128391224, 160489030, 320978060, 641956120]

約数ペア:

[(1, 641956120), (2, 320978060), (4, 160489030), (5, 128391224), (8, 80244515), (10, 64195612), (13, 49381240), (20, 32097806), (26, 24690620), (40, 16048903), (52, 12345310), (65, 9876248), (104, 6172655), (130, 4938124), (260, 2469062), (520, 1234531)]