21307890

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{30881}}^1$

素因数の和:30914

約数の個数: 32

約数和(自身を含む): 53364096

約数和(自身を除く): 32056206

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690, 30881, 61762, 92643, 154405, 185286, 308810, 463215, 710263, 926430, 1420526, 2130789, 3551315, 4261578, 7102630, 10653945, 21307890]

約数ペア:

[(1, 21307890), (2, 10653945), (3, 7102630), (5, 4261578), (6, 3551315), (10, 2130789), (15, 1420526), (23, 926430), (30, 710263), (46, 463215), (69, 308810), (115, 185286), (138, 154405), (230, 92643), (345, 61762), (690, 30881)]