21490300

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{271}}^1$

素因数の和:359

約数の個数: 72

約数和(自身を含む): 51232832

約数和(自身を除く): 29742532

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 61, 65, 100, 122, 130, 244, 260, 271, 305, 325, 542, 610, 650, 793, 1084, 1220, 1300, 1355, 1525, 1586, 2710, 3050, 3172, 3523, 3965, 5420, 6100, 6775, 7046, 7930, 13550, 14092, 15860, 16531, 17615, 19825, 27100, 33062, 35230, 39650, 66124, 70460, 79300, 82655, 88075, 165310, 176150, 214903, 330620, 352300, 413275, 429806, 826550, 859612, 1074515, 1653100, 2149030, 4298060, 5372575, 10745150, 21490300]

約数ペア:

[(1, 21490300), (2, 10745150), (4, 5372575), (5, 4298060), (10, 2149030), (13, 1653100), (20, 1074515), (25, 859612), (26, 826550), (50, 429806), (52, 413275), (61, 352300), (65, 330620), (100, 214903), (122, 176150), (130, 165310), (244, 88075), (260, 82655), (271, 79300), (305, 70460), (325, 66124), (542, 39650), (610, 35230), (650, 33062), (793, 27100), (1084, 19825), (1220, 17615), (1300, 16531), (1355, 15860), (1525, 14092), (1586, 13550), (2710, 7930), (3050, 7046), (3172, 6775), (3523, 6100), (3965, 5420)]