21653865

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5531}}^1$

素因数の和:5574

約数の個数: 32

約数和(自身を含む): 39830400

約数和(自身を除く): 18176535

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5531, 16593, 27655, 49779, 82965, 149337, 160399, 248895, 481197, 746685, 801995, 1443591, 2405985, 4330773, 7217955, 21653865]

約数ペア:

[(1, 21653865), (3, 7217955), (5, 4330773), (9, 2405985), (15, 1443591), (27, 801995), (29, 746685), (45, 481197), (87, 248895), (135, 160399), (145, 149337), (261, 82965), (435, 49779), (783, 27655), (1305, 16593), (3915, 5531)]