21972080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{571}}^1$

素因数の和:634

約数の個数: 80

約数和(自身を含む): 56600544

約数和(自身を除く): 34628464

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 37, 40, 52, 65, 74, 80, 104, 130, 148, 185, 208, 260, 296, 370, 481, 520, 571, 592, 740, 962, 1040, 1142, 1480, 1924, 2284, 2405, 2855, 2960, 3848, 4568, 4810, 5710, 7423, 7696, 9136, 9620, 11420, 14846, 19240, 21127, 22840, 29692, 37115, 38480, 42254, 45680, 59384, 74230, 84508, 105635, 118768, 148460, 169016, 211270, 274651, 296920, 338032, 422540, 549302, 593840, 845080, 1098604, 1373255, 1690160, 2197208, 2746510, 4394416, 5493020, 10986040, 21972080]

約数ペア:

[(1, 21972080), (2, 10986040), (4, 5493020), (5, 4394416), (8, 2746510), (10, 2197208), (13, 1690160), (16, 1373255), (20, 1098604), (26, 845080), (37, 593840), (40, 549302), (52, 422540), (65, 338032), (74, 296920), (80, 274651), (104, 211270), (130, 169016), (148, 148460), (185, 118768), (208, 105635), (260, 84508), (296, 74230), (370, 59384), (481, 45680), (520, 42254), (571, 38480), (592, 37115), (740, 29692), (962, 22840), (1040, 21127), (1142, 19240), (1480, 14846), (1924, 11420), (2284, 9620), (2405, 9136), (2855, 7696), (2960, 7423), (3848, 5710), (4568, 4810)]