16620975

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 34780512

約数和(自身を除く): 18159537

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 61, 63, 75, 105, 173, 175, 183, 225, 305, 315, 427, 519, 525, 549, 865, 915, 1211, 1281, 1525, 1557, 1575, 2135, 2595, 2745, 3633, 3843, 4325, 4575, 6055, 6405, 7785, 10553, 10675, 10899, 12975, 13725, 18165, 19215, 30275, 31659, 32025, 38925, 52765, 54495, 73871, 90825, 94977, 96075, 158295, 221613, 263825, 272475, 369355, 474885, 664839, 791475, 1108065, 1846775, 2374425, 3324195, 5540325, 16620975]

約数ペア:

[(1, 16620975), (3, 5540325), (5, 3324195), (7, 2374425), (9, 1846775), (15, 1108065), (21, 791475), (25, 664839), (35, 474885), (45, 369355), (61, 272475), (63, 263825), (75, 221613), (105, 158295), (173, 96075), (175, 94977), (183, 90825), (225, 73871), (305, 54495), (315, 52765), (427, 38925), (519, 32025), (525, 31659), (549, 30275), (865, 19215), (915, 18165), (1211, 13725), (1281, 12975), (1525, 10899), (1557, 10675), (1575, 10553), (2135, 7785), (2595, 6405), (2745, 6055), (3633, 4575), (3843, 4325)]