19418920

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1889}}^1$

素因数の和:2157

約数の個数: 32

約数和(自身を含む): 43885800

約数和(自身を除く): 24466880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 1889, 2056, 2570, 3778, 5140, 7556, 9445, 10280, 15112, 18890, 37780, 75560, 485473, 970946, 1941892, 2427365, 3883784, 4854730, 9709460, 19418920]

約数ペア:

[(1, 19418920), (2, 9709460), (4, 4854730), (5, 3883784), (8, 2427365), (10, 1941892), (20, 970946), (40, 485473), (257, 75560), (514, 37780), (1028, 18890), (1285, 15112), (1889, 10280), (2056, 9445), (2570, 7556), (3778, 5140)]