656240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{631}}^1$

素因数の和:657

約数の個数: 40

約数和(自身を含む): 1645728

約数和(自身を除く): 989488

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 631, 1040, 1262, 2524, 3155, 5048, 6310, 8203, 10096, 12620, 16406, 25240, 32812, 41015, 50480, 65624, 82030, 131248, 164060, 328120, 656240]

約数ペア:

[(1, 656240), (2, 328120), (4, 164060), (5, 131248), (8, 82030), (10, 65624), (13, 50480), (16, 41015), (20, 32812), (26, 25240), (40, 16406), (52, 12620), (65, 10096), (80, 8203), (104, 6310), (130, 5048), (208, 3155), (260, 2524), (520, 1262), (631, 1040)]