20785960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{563}}^1$

素因数の和:658

約数の個数: 64

約数和(自身を含む): 51166080

約数和(自身を除く): 30380120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 71, 104, 130, 142, 260, 284, 355, 520, 563, 568, 710, 923, 1126, 1420, 1846, 2252, 2815, 2840, 3692, 4504, 4615, 5630, 7319, 7384, 9230, 11260, 14638, 18460, 22520, 29276, 36595, 36920, 39973, 58552, 73190, 79946, 146380, 159892, 199865, 292760, 319784, 399730, 519649, 799460, 1039298, 1598920, 2078596, 2598245, 4157192, 5196490, 10392980, 20785960]

約数ペア:

[(1, 20785960), (2, 10392980), (4, 5196490), (5, 4157192), (8, 2598245), (10, 2078596), (13, 1598920), (20, 1039298), (26, 799460), (40, 519649), (52, 399730), (65, 319784), (71, 292760), (104, 199865), (130, 159892), (142, 146380), (260, 79946), (284, 73190), (355, 58552), (520, 39973), (563, 36920), (568, 36595), (710, 29276), (923, 22520), (1126, 18460), (1420, 14638), (1846, 11260), (2252, 9230), (2815, 7384), (2840, 7319), (3692, 5630), (4504, 4615)]