21472420

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{431}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 47029248

約数和(自身を除く): 25556828

約数列:

[1, 2, 4, 5, 10, 20, 47, 53, 94, 106, 188, 212, 235, 265, 431, 470, 530, 862, 940, 1060, 1724, 2155, 2491, 4310, 4982, 8620, 9964, 12455, 20257, 22843, 24910, 40514, 45686, 49820, 81028, 91372, 101285, 114215, 202570, 228430, 405140, 456860, 1073621, 2147242, 4294484, 5368105, 10736210, 21472420]

約数ペア:

[(1, 21472420), (2, 10736210), (4, 5368105), (5, 4294484), (10, 2147242), (20, 1073621), (47, 456860), (53, 405140), (94, 228430), (106, 202570), (188, 114215), (212, 101285), (235, 91372), (265, 81028), (431, 49820), (470, 45686), (530, 40514), (862, 24910), (940, 22843), (1060, 20257), (1724, 12455), (2155, 9964), (2491, 8620), (4310, 4982)]