21491940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1979}}^1$

素因数の和:2172

約数の個数: 48

約数和(自身を含む): 60540480

約数和(自身を除く): 39048540

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 181, 362, 543, 724, 905, 1086, 1810, 1979, 2172, 2715, 3620, 3958, 5430, 5937, 7916, 9895, 10860, 11874, 19790, 23748, 29685, 39580, 59370, 118740, 358199, 716398, 1074597, 1432796, 1790995, 2149194, 3581990, 4298388, 5372985, 7163980, 10745970, 21491940]

約数ペア:

[(1, 21491940), (2, 10745970), (3, 7163980), (4, 5372985), (5, 4298388), (6, 3581990), (10, 2149194), (12, 1790995), (15, 1432796), (20, 1074597), (30, 716398), (60, 358199), (181, 118740), (362, 59370), (543, 39580), (724, 29685), (905, 23748), (1086, 19790), (1810, 11874), (1979, 10860), (2172, 9895), (2715, 7916), (3620, 5937), (3958, 5430)]