81420820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{109}}^1$

素因数の和:174

約数の個数: 96

約数和(自身を含む): 197920800

約数和(自身を除く): 116499980

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 109, 130, 169, 170, 218, 221, 260, 338, 340, 436, 442, 545, 676, 845, 884, 1090, 1105, 1417, 1690, 1853, 2180, 2197, 2210, 2834, 2873, 3380, 3706, 4394, 4420, 5668, 5746, 7085, 7412, 8788, 9265, 10985, 11492, 14170, 14365, 18421, 18530, 21970, 24089, 28340, 28730, 36842, 37060, 37349, 43940, 48178, 57460, 73684, 74698, 92105, 96356, 120445, 149396, 184210, 186745, 239473, 240890, 313157, 368420, 373490, 478946, 481780, 626314, 746980, 957892, 1197365, 1252628, 1565785, 2394730, 3131570, 4071041, 4789460, 6263140, 8142082, 16284164, 20355205, 40710410, 81420820]

約数ペア:

[(1, 81420820), (2, 40710410), (4, 20355205), (5, 16284164), (10, 8142082), (13, 6263140), (17, 4789460), (20, 4071041), (26, 3131570), (34, 2394730), (52, 1565785), (65, 1252628), (68, 1197365), (85, 957892), (109, 746980), (130, 626314), (169, 481780), (170, 478946), (218, 373490), (221, 368420), (260, 313157), (338, 240890), (340, 239473), (436, 186745), (442, 184210), (545, 149396), (676, 120445), (845, 96356), (884, 92105), (1090, 74698), (1105, 73684), (1417, 57460), (1690, 48178), (1853, 43940), (2180, 37349), (2197, 37060), (2210, 36842), (2834, 28730), (2873, 28340), (3380, 24089), (3706, 21970), (4394, 18530), (4420, 18421), (5668, 14365), (5746, 14170), (7085, 11492), (7412, 10985), (8788, 9265)]