21780975

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{167}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 37997568

約数和(自身を除く): 16216593

約数列:

[1, 3, 5, 15, 25, 37, 47, 75, 111, 141, 167, 185, 235, 501, 555, 705, 835, 925, 1175, 1739, 2505, 2775, 3525, 4175, 5217, 6179, 7849, 8695, 12525, 18537, 23547, 26085, 30895, 39245, 43475, 92685, 117735, 130425, 154475, 196225, 290413, 463425, 588675, 871239, 1452065, 4356195, 7260325, 21780975]

約数ペア:

[(1, 21780975), (3, 7260325), (5, 4356195), (15, 1452065), (25, 871239), (37, 588675), (47, 463425), (75, 290413), (111, 196225), (141, 154475), (167, 130425), (185, 117735), (235, 92685), (501, 43475), (555, 39245), (705, 30895), (835, 26085), (925, 23547), (1175, 18537), (1739, 12525), (2505, 8695), (2775, 7849), (3525, 6179), (4175, 5217)]