21816340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11987}}^1$

素因数の和:12016

約数の個数: 48

約数和(自身を含む): 56391552

約数和(自身を除く): 34575212

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11987, 23974, 47948, 59935, 83909, 119870, 155831, 167818, 239740, 311662, 335636, 419545, 623324, 779155, 839090, 1090817, 1558310, 1678180, 2181634, 3116620, 4363268, 5454085, 10908170, 21816340]

約数ペア:

[(1, 21816340), (2, 10908170), (4, 5454085), (5, 4363268), (7, 3116620), (10, 2181634), (13, 1678180), (14, 1558310), (20, 1090817), (26, 839090), (28, 779155), (35, 623324), (52, 419545), (65, 335636), (70, 311662), (91, 239740), (130, 167818), (140, 155831), (182, 119870), (260, 83909), (364, 59935), (455, 47948), (910, 23974), (1820, 11987)]