21072040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{577}}^1$

素因数の和:682

約数の個数: 64

約数和(自身を含む): 52436160

約数和(自身を除く): 31364120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 83, 88, 110, 166, 220, 332, 415, 440, 577, 664, 830, 913, 1154, 1660, 1826, 2308, 2885, 3320, 3652, 4565, 4616, 5770, 6347, 7304, 9130, 11540, 12694, 18260, 23080, 25388, 31735, 36520, 47891, 50776, 63470, 95782, 126940, 191564, 239455, 253880, 383128, 478910, 526801, 957820, 1053602, 1915640, 2107204, 2634005, 4214408, 5268010, 10536020, 21072040]

約数ペア:

[(1, 21072040), (2, 10536020), (4, 5268010), (5, 4214408), (8, 2634005), (10, 2107204), (11, 1915640), (20, 1053602), (22, 957820), (40, 526801), (44, 478910), (55, 383128), (83, 253880), (88, 239455), (110, 191564), (166, 126940), (220, 95782), (332, 63470), (415, 50776), (440, 47891), (577, 36520), (664, 31735), (830, 25388), (913, 23080), (1154, 18260), (1660, 12694), (1826, 11540), (2308, 9130), (2885, 7304), (3320, 6347), (3652, 5770), (4565, 4616)]