21252920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1777}}^1$

素因数の和:1824

約数の個数: 64

約数和(自身を含む): 53766720

約数和(自身を除く): 32513800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 46, 52, 65, 92, 104, 115, 130, 184, 230, 260, 299, 460, 520, 598, 920, 1196, 1495, 1777, 2392, 2990, 3554, 5980, 7108, 8885, 11960, 14216, 17770, 23101, 35540, 40871, 46202, 71080, 81742, 92404, 115505, 163484, 184808, 204355, 231010, 326968, 408710, 462020, 531323, 817420, 924040, 1062646, 1634840, 2125292, 2656615, 4250584, 5313230, 10626460, 21252920]

約数ペア:

[(1, 21252920), (2, 10626460), (4, 5313230), (5, 4250584), (8, 2656615), (10, 2125292), (13, 1634840), (20, 1062646), (23, 924040), (26, 817420), (40, 531323), (46, 462020), (52, 408710), (65, 326968), (92, 231010), (104, 204355), (115, 184808), (130, 163484), (184, 115505), (230, 92404), (260, 81742), (299, 71080), (460, 46202), (520, 40871), (598, 35540), (920, 23101), (1196, 17770), (1495, 14216), (1777, 11960), (2392, 8885), (2990, 7108), (3554, 5980)]