21717525

素因数分解:

$3^1\times 5^2\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 37640448

約数和(自身を除く): 15922923

約数列:

[1, 3, 5, 15, 25, 47, 61, 75, 101, 141, 183, 235, 303, 305, 505, 705, 915, 1175, 1515, 1525, 2525, 2867, 3525, 4575, 4747, 6161, 7575, 8601, 14241, 14335, 18483, 23735, 30805, 43005, 71205, 71675, 92415, 118675, 154025, 215025, 289567, 356025, 462075, 868701, 1447835, 4343505, 7239175, 21717525]

約数ペア:

[(1, 21717525), (3, 7239175), (5, 4343505), (15, 1447835), (25, 868701), (47, 462075), (61, 356025), (75, 289567), (101, 215025), (141, 154025), (183, 118675), (235, 92415), (303, 71675), (305, 71205), (505, 43005), (705, 30805), (915, 23735), (1175, 18483), (1515, 14335), (1525, 14241), (2525, 8601), (2867, 7575), (3525, 6161), (4575, 4747)]