19996600

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7691}}^1$

素因数の和:7720

約数の個数: 48

約数和(自身を含む): 50074920

約数和(自身を除く): 30078320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 7691, 15382, 30764, 38455, 61528, 76910, 99983, 153820, 192275, 199966, 307640, 384550, 399932, 499915, 769100, 799864, 999830, 1538200, 1999660, 2499575, 3999320, 4999150, 9998300, 19996600]

約数ペア:

[(1, 19996600), (2, 9998300), (4, 4999150), (5, 3999320), (8, 2499575), (10, 1999660), (13, 1538200), (20, 999830), (25, 799864), (26, 769100), (40, 499915), (50, 399932), (52, 384550), (65, 307640), (100, 199966), (104, 192275), (130, 153820), (200, 99983), (260, 76910), (325, 61528), (520, 38455), (650, 30764), (1300, 15382), (2600, 7691)]