19940180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{283}}^1$

素因数の和:576

約数の個数: 48

約数和(自身を含む): 45421824

約数和(自身を除く): 25481644

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 271, 283, 542, 566, 1084, 1132, 1355, 1415, 2710, 2830, 3523, 3679, 5420, 5660, 7046, 7358, 14092, 14716, 17615, 18395, 35230, 36790, 70460, 73580, 76693, 153386, 306772, 383465, 766930, 997009, 1533860, 1994018, 3988036, 4985045, 9970090, 19940180]

約数ペア:

[(1, 19940180), (2, 9970090), (4, 4985045), (5, 3988036), (10, 1994018), (13, 1533860), (20, 997009), (26, 766930), (52, 383465), (65, 306772), (130, 153386), (260, 76693), (271, 73580), (283, 70460), (542, 36790), (566, 35230), (1084, 18395), (1132, 17615), (1355, 14716), (1415, 14092), (2710, 7358), (2830, 7046), (3523, 5660), (3679, 5420)]