19157840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^3\times {\mathrm{109}}^1$

素因数の和:161

約数の個数: 80

約数和(自身を含む): 48694800

約数和(自身を除く): 29536960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 109, 130, 169, 208, 218, 260, 338, 436, 520, 545, 676, 845, 872, 1040, 1090, 1352, 1417, 1690, 1744, 2180, 2197, 2704, 2834, 3380, 4360, 4394, 5668, 6760, 7085, 8720, 8788, 10985, 11336, 13520, 14170, 17576, 18421, 21970, 22672, 28340, 35152, 36842, 43940, 56680, 73684, 87880, 92105, 113360, 147368, 175760, 184210, 239473, 294736, 368420, 478946, 736840, 957892, 1197365, 1473680, 1915784, 2394730, 3831568, 4789460, 9578920, 19157840]

約数ペア:

[(1, 19157840), (2, 9578920), (4, 4789460), (5, 3831568), (8, 2394730), (10, 1915784), (13, 1473680), (16, 1197365), (20, 957892), (26, 736840), (40, 478946), (52, 368420), (65, 294736), (80, 239473), (104, 184210), (109, 175760), (130, 147368), (169, 113360), (208, 92105), (218, 87880), (260, 73684), (338, 56680), (436, 43940), (520, 36842), (545, 35152), (676, 28340), (845, 22672), (872, 21970), (1040, 18421), (1090, 17576), (1352, 14170), (1417, 13520), (1690, 11336), (1744, 10985), (2180, 8788), (2197, 8720), (2704, 7085), (2834, 6760), (3380, 5668), (4360, 4394)]