21515000

素因数分解:

$2^3\times 5^4\times {\mathrm{13}}^1\times {\mathrm{331}}^1$

素因数の和:370

約数の個数: 80

約数和(自身を含む): 54451320

約数和(自身を除く): 32936320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 325, 331, 500, 520, 625, 650, 662, 1000, 1250, 1300, 1324, 1625, 1655, 2500, 2600, 2648, 3250, 3310, 4303, 5000, 6500, 6620, 8125, 8275, 8606, 13000, 13240, 16250, 16550, 17212, 21515, 32500, 33100, 34424, 41375, 43030, 65000, 66200, 82750, 86060, 107575, 165500, 172120, 206875, 215150, 331000, 413750, 430300, 537875, 827500, 860600, 1075750, 1655000, 2151500, 2689375, 4303000, 5378750, 10757500, 21515000]

約数ペア:

[(1, 21515000), (2, 10757500), (4, 5378750), (5, 4303000), (8, 2689375), (10, 2151500), (13, 1655000), (20, 1075750), (25, 860600), (26, 827500), (40, 537875), (50, 430300), (52, 413750), (65, 331000), (100, 215150), (104, 206875), (125, 172120), (130, 165500), (200, 107575), (250, 86060), (260, 82750), (325, 66200), (331, 65000), (500, 43030), (520, 41375), (625, 34424), (650, 33100), (662, 32500), (1000, 21515), (1250, 17212), (1300, 16550), (1324, 16250), (1625, 13240), (1655, 13000), (2500, 8606), (2600, 8275), (2648, 8125), (3250, 6620), (3310, 6500), (4303, 5000)]