20997620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6521}}^1$

素因数の和:6560

約数の個数: 48

約数和(自身を含む): 52593408

約数和(自身を除く): 31595788

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6521, 13042, 26084, 32605, 45647, 65210, 91294, 130420, 149983, 182588, 228235, 299966, 456470, 599932, 749915, 912940, 1049881, 1499830, 2099762, 2999660, 4199524, 5249405, 10498810, 20997620]

約数ペア:

[(1, 20997620), (2, 10498810), (4, 5249405), (5, 4199524), (7, 2999660), (10, 2099762), (14, 1499830), (20, 1049881), (23, 912940), (28, 749915), (35, 599932), (46, 456470), (70, 299966), (92, 228235), (115, 182588), (140, 149983), (161, 130420), (230, 91294), (322, 65210), (460, 45647), (644, 32605), (805, 26084), (1610, 13042), (3220, 6521)]