20807760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{479}}^1$

素因数の和:676

約数の個数: 80

約数和(自身を含む): 64995840

約数和(自身を除く): 44188080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 181, 240, 362, 479, 543, 724, 905, 958, 1086, 1437, 1448, 1810, 1916, 2172, 2395, 2715, 2874, 2896, 3620, 3832, 4344, 4790, 5430, 5748, 7185, 7240, 7664, 8688, 9580, 10860, 11496, 14370, 14480, 19160, 21720, 22992, 28740, 38320, 43440, 57480, 86699, 114960, 173398, 260097, 346796, 433495, 520194, 693592, 866990, 1040388, 1300485, 1387184, 1733980, 2080776, 2600970, 3467960, 4161552, 5201940, 6935920, 10403880, 20807760]

約数ペア:

[(1, 20807760), (2, 10403880), (3, 6935920), (4, 5201940), (5, 4161552), (6, 3467960), (8, 2600970), (10, 2080776), (12, 1733980), (15, 1387184), (16, 1300485), (20, 1040388), (24, 866990), (30, 693592), (40, 520194), (48, 433495), (60, 346796), (80, 260097), (120, 173398), (181, 114960), (240, 86699), (362, 57480), (479, 43440), (543, 38320), (724, 28740), (905, 22992), (958, 21720), (1086, 19160), (1437, 14480), (1448, 14370), (1810, 11496), (1916, 10860), (2172, 9580), (2395, 8688), (2715, 7664), (2874, 7240), (2896, 7185), (3620, 5748), (3832, 5430), (4344, 4790)]