90012820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{829}}^1$

素因数の和:988

約数の個数: 48

約数和(自身を含む): 194518800

約数和(自身を除く): 104505980

約数列:

[1, 2, 4, 5, 10, 20, 61, 89, 122, 178, 244, 305, 356, 445, 610, 829, 890, 1220, 1658, 1780, 3316, 4145, 5429, 8290, 10858, 16580, 21716, 27145, 50569, 54290, 73781, 101138, 108580, 147562, 202276, 252845, 295124, 368905, 505690, 737810, 1011380, 1475620, 4500641, 9001282, 18002564, 22503205, 45006410, 90012820]

約数ペア:

[(1, 90012820), (2, 45006410), (4, 22503205), (5, 18002564), (10, 9001282), (20, 4500641), (61, 1475620), (89, 1011380), (122, 737810), (178, 505690), (244, 368905), (305, 295124), (356, 252845), (445, 202276), (610, 147562), (829, 108580), (890, 101138), (1220, 73781), (1658, 54290), (1780, 50569), (3316, 27145), (4145, 21716), (5429, 16580), (8290, 10858)]