21413745

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 39171600

約数和(自身を除く): 17757855

約数列:

[1, 3, 5, 9, 15, 29, 45, 61, 87, 145, 183, 261, 269, 305, 435, 549, 807, 915, 1305, 1345, 1769, 2421, 2745, 4035, 5307, 7801, 8845, 12105, 15921, 16409, 23403, 26535, 39005, 49227, 70209, 79605, 82045, 117015, 147681, 246135, 351045, 475861, 738405, 1427583, 2379305, 4282749, 7137915, 21413745]

約数ペア:

[(1, 21413745), (3, 7137915), (5, 4282749), (9, 2379305), (15, 1427583), (29, 738405), (45, 475861), (61, 351045), (87, 246135), (145, 147681), (183, 117015), (261, 82045), (269, 79605), (305, 70209), (435, 49227), (549, 39005), (807, 26535), (915, 23403), (1305, 16409), (1345, 15921), (1769, 12105), (2421, 8845), (2745, 7801), (4035, 5307)]