20121902720

素因数分解:

$2^7\times 5^1\times {\mathrm{1709}}^1\times {\mathrm{18397}}^1$

素因数の和:20125

約数の個数: 64

約数和(自身を含む): 48134687400

約数和(自身を除く): 28012784680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 1709, 3418, 6836, 8545, 13672, 17090, 18397, 27344, 34180, 36794, 54688, 68360, 73588, 91985, 109376, 136720, 147176, 183970, 218752, 273440, 294352, 367940, 546880, 588704, 735880, 1093760, 1177408, 1471760, 2354816, 2943520, 5887040, 11774080, 31440473, 62880946, 125761892, 157202365, 251523784, 314404730, 503047568, 628809460, 1006095136, 1257618920, 2012190272, 2515237840, 4024380544, 5030475680, 10060951360, 20121902720]

約数ペア:

[(1, 20121902720), (2, 10060951360), (4, 5030475680), (5, 4024380544), (8, 2515237840), (10, 2012190272), (16, 1257618920), (20, 1006095136), (32, 628809460), (40, 503047568), (64, 314404730), (80, 251523784), (128, 157202365), (160, 125761892), (320, 62880946), (640, 31440473), (1709, 11774080), (3418, 5887040), (6836, 2943520), (8545, 2354816), (13672, 1471760), (17090, 1177408), (18397, 1093760), (27344, 735880), (34180, 588704), (36794, 546880), (54688, 367940), (68360, 294352), (73588, 273440), (91985, 218752), (109376, 183970), (136720, 147176)]