21288060

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{227}}^1\times {\mathrm{521}}^1$

素因数の和:763

約数の個数: 72

約数和(自身を含む): 64982736

約数和(自身を除く): 43694676

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 227, 454, 521, 681, 908, 1042, 1135, 1362, 1563, 2043, 2084, 2270, 2605, 2724, 3126, 3405, 4086, 4540, 4689, 5210, 6252, 6810, 7815, 8172, 9378, 10215, 10420, 13620, 15630, 18756, 20430, 23445, 31260, 40860, 46890, 93780, 118267, 236534, 354801, 473068, 591335, 709602, 1064403, 1182670, 1419204, 1774005, 2128806, 2365340, 3548010, 4257612, 5322015, 7096020, 10644030, 21288060]

約数ペア:

[(1, 21288060), (2, 10644030), (3, 7096020), (4, 5322015), (5, 4257612), (6, 3548010), (9, 2365340), (10, 2128806), (12, 1774005), (15, 1419204), (18, 1182670), (20, 1064403), (30, 709602), (36, 591335), (45, 473068), (60, 354801), (90, 236534), (180, 118267), (227, 93780), (454, 46890), (521, 40860), (681, 31260), (908, 23445), (1042, 20430), (1135, 18756), (1362, 15630), (1563, 13620), (2043, 10420), (2084, 10215), (2270, 9378), (2605, 8172), (2724, 7815), (3126, 6810), (3405, 6252), (4086, 5210), (4540, 4689)]