19487780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4409}}^1$

素因数の和:4448

約数の個数: 48

約数和(自身を含む): 46675440

約数和(自身を除く): 27187660

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4409, 4420, 8818, 17636, 22045, 44090, 57317, 74953, 88180, 114634, 149906, 229268, 286585, 299812, 374765, 573170, 749530, 974389, 1146340, 1499060, 1948778, 3897556, 4871945, 9743890, 19487780]

約数ペア:

[(1, 19487780), (2, 9743890), (4, 4871945), (5, 3897556), (10, 1948778), (13, 1499060), (17, 1146340), (20, 974389), (26, 749530), (34, 573170), (52, 374765), (65, 299812), (68, 286585), (85, 229268), (130, 149906), (170, 114634), (221, 88180), (260, 74953), (340, 57317), (442, 44090), (884, 22045), (1105, 17636), (2210, 8818), (4409, 4420)]