18658280

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{367}}^1$

素因数の和:450

約数の個数: 64

約数和(自身を含む): 44513280

約数和(自身を除く): 25855000

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 41, 62, 82, 124, 155, 164, 205, 248, 310, 328, 367, 410, 620, 734, 820, 1240, 1271, 1468, 1640, 1835, 2542, 2936, 3670, 5084, 6355, 7340, 10168, 11377, 12710, 14680, 15047, 22754, 25420, 30094, 45508, 50840, 56885, 60188, 75235, 91016, 113770, 120376, 150470, 227540, 300940, 455080, 466457, 601880, 932914, 1865828, 2332285, 3731656, 4664570, 9329140, 18658280]

約数ペア:

[(1, 18658280), (2, 9329140), (4, 4664570), (5, 3731656), (8, 2332285), (10, 1865828), (20, 932914), (31, 601880), (40, 466457), (41, 455080), (62, 300940), (82, 227540), (124, 150470), (155, 120376), (164, 113770), (205, 91016), (248, 75235), (310, 60188), (328, 56885), (367, 50840), (410, 45508), (620, 30094), (734, 25420), (820, 22754), (1240, 15047), (1271, 14680), (1468, 12710), (1640, 11377), (1835, 10168), (2542, 7340), (2936, 6355), (3670, 5084)]