19865950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{2351}}^1$

素因数の和:2389

約数の個数: 36

約数和(自身を含む): 40028688

約数和(自身を除く): 20162738

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 169, 325, 338, 650, 845, 1690, 2351, 4225, 4702, 8450, 11755, 23510, 30563, 58775, 61126, 117550, 152815, 305630, 397319, 764075, 794638, 1528150, 1986595, 3973190, 9932975, 19865950]

約数ペア:

[(1, 19865950), (2, 9932975), (5, 3973190), (10, 1986595), (13, 1528150), (25, 794638), (26, 764075), (50, 397319), (65, 305630), (130, 152815), (169, 117550), (325, 61126), (338, 58775), (650, 30563), (845, 23510), (1690, 11755), (2351, 8450), (4225, 4702)]