21199725

素因数分解:

$3^4\times 5^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1$

素因数の和:89

約数の個数: 90

約数和(自身を含む): 42873930

約数和(自身を除く): 21674205

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 29, 45, 57, 75, 81, 87, 95, 135, 145, 171, 225, 261, 285, 361, 405, 435, 475, 513, 551, 675, 725, 783, 855, 1083, 1305, 1425, 1539, 1653, 1805, 2025, 2175, 2349, 2565, 2755, 3249, 3915, 4275, 4959, 5415, 6525, 7695, 8265, 9025, 9747, 10469, 11745, 12825, 13775, 14877, 16245, 19575, 24795, 27075, 29241, 31407, 38475, 41325, 44631, 48735, 52345, 58725, 74385, 81225, 94221, 123975, 146205, 157035, 223155, 243675, 261725, 282663, 371925, 471105, 731025, 785175, 847989, 1115775, 1413315, 2355525, 4239945, 7066575, 21199725]

約数ペア:

[(1, 21199725), (3, 7066575), (5, 4239945), (9, 2355525), (15, 1413315), (19, 1115775), (25, 847989), (27, 785175), (29, 731025), (45, 471105), (57, 371925), (75, 282663), (81, 261725), (87, 243675), (95, 223155), (135, 157035), (145, 146205), (171, 123975), (225, 94221), (261, 81225), (285, 74385), (361, 58725), (405, 52345), (435, 48735), (475, 44631), (513, 41325), (551, 38475), (675, 31407), (725, 29241), (783, 27075), (855, 24795), (1083, 19575), (1305, 16245), (1425, 14877), (1539, 13775), (1653, 12825), (1805, 11745), (2025, 10469), (2175, 9747), (2349, 9025), (2565, 8265), (2755, 7695), (3249, 6525), (3915, 5415), (4275, 4959)]