21301120

素因数分解:

$2^7\times 5^1\times {\mathrm{83}}^1\times {\mathrm{401}}^1$

素因数の和:503

約数の個数: 64

約数和(自身を含む): 51665040

約数和(自身を除く): 30363920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 83, 128, 160, 166, 320, 332, 401, 415, 640, 664, 802, 830, 1328, 1604, 1660, 2005, 2656, 3208, 3320, 4010, 5312, 6416, 6640, 8020, 10624, 12832, 13280, 16040, 25664, 26560, 32080, 33283, 51328, 53120, 64160, 66566, 128320, 133132, 166415, 256640, 266264, 332830, 532528, 665660, 1065056, 1331320, 2130112, 2662640, 4260224, 5325280, 10650560, 21301120]

約数ペア:

[(1, 21301120), (2, 10650560), (4, 5325280), (5, 4260224), (8, 2662640), (10, 2130112), (16, 1331320), (20, 1065056), (32, 665660), (40, 532528), (64, 332830), (80, 266264), (83, 256640), (128, 166415), (160, 133132), (166, 128320), (320, 66566), (332, 64160), (401, 53120), (415, 51328), (640, 33283), (664, 32080), (802, 26560), (830, 25664), (1328, 16040), (1604, 13280), (1660, 12832), (2005, 10624), (2656, 8020), (3208, 6640), (3320, 6416), (4010, 5312)]