648066625

素因数分解:

$5^3\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 886579200

約数和(自身を除く): 238512575

約数列:

[1, 5, 25, 29, 31, 73, 79, 125, 145, 155, 365, 395, 725, 775, 899, 1825, 1975, 2117, 2263, 2291, 2449, 3625, 3875, 4495, 5767, 9125, 9875, 10585, 11315, 11455, 12245, 22475, 28835, 52925, 56575, 57275, 61225, 65627, 71021, 112375, 144175, 167243, 178777, 264625, 282875, 286375, 306125, 328135, 355105, 720875, 836215, 893885, 1640675, 1775525, 4181075, 4469425, 5184533, 8203375, 8877625, 20905375, 22347125, 25922665, 129613325, 648066625]

約数ペア:

[(1, 648066625), (5, 129613325), (25, 25922665), (29, 22347125), (31, 20905375), (73, 8877625), (79, 8203375), (125, 5184533), (145, 4469425), (155, 4181075), (365, 1775525), (395, 1640675), (725, 893885), (775, 836215), (899, 720875), (1825, 355105), (1975, 328135), (2117, 306125), (2263, 286375), (2291, 282875), (2449, 264625), (3625, 178777), (3875, 167243), (4495, 144175), (5767, 112375), (9125, 71021), (9875, 65627), (10585, 61225), (11315, 57275), (11455, 56575), (12245, 52925), (22475, 28835)]