1905020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{431}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 4572288

約数和(自身を除く): 2667268

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 431, 442, 862, 884, 1105, 1724, 2155, 2210, 4310, 4420, 5603, 7327, 8620, 11206, 14654, 22412, 28015, 29308, 36635, 56030, 73270, 95251, 112060, 146540, 190502, 381004, 476255, 952510, 1905020]

約数ペア:

[(1, 1905020), (2, 952510), (4, 476255), (5, 381004), (10, 190502), (13, 146540), (17, 112060), (20, 95251), (26, 73270), (34, 56030), (52, 36635), (65, 29308), (68, 28015), (85, 22412), (130, 14654), (170, 11206), (221, 8620), (260, 7327), (340, 5603), (431, 4420), (442, 4310), (862, 2210), (884, 2155), (1105, 1724)]