21090075

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{193}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 36950016

約数和(自身を除く): 15859941

約数列:

[1, 3, 5, 15, 25, 31, 47, 75, 93, 141, 155, 193, 235, 465, 579, 705, 775, 965, 1175, 1457, 2325, 2895, 3525, 4371, 4825, 5983, 7285, 9071, 14475, 17949, 21855, 27213, 29915, 36425, 45355, 89745, 109275, 136065, 149575, 226775, 281201, 448725, 680325, 843603, 1406005, 4218015, 7030025, 21090075]

約数ペア:

[(1, 21090075), (3, 7030025), (5, 4218015), (15, 1406005), (25, 843603), (31, 680325), (47, 448725), (75, 281201), (93, 226775), (141, 149575), (155, 136065), (193, 109275), (235, 89745), (465, 45355), (579, 36425), (705, 29915), (775, 27213), (965, 21855), (1175, 17949), (1457, 14475), (2325, 9071), (2895, 7285), (3525, 5983), (4371, 4825)]