20721090

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:164

約数の個数: 96

約数和(自身を含む): 55550016

約数和(自身を除く): 34828926

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 61, 65, 67, 78, 122, 130, 134, 169, 183, 195, 201, 305, 335, 338, 366, 390, 402, 507, 610, 670, 793, 845, 871, 915, 1005, 1014, 1586, 1690, 1742, 1830, 2010, 2379, 2535, 2613, 3965, 4087, 4355, 4758, 5070, 5226, 7930, 8174, 8710, 10309, 11323, 11895, 12261, 13065, 20435, 20618, 22646, 23790, 24522, 26130, 30927, 33969, 40870, 51545, 53131, 56615, 61305, 61854, 67938, 103090, 106262, 113230, 122610, 154635, 159393, 169845, 265655, 309270, 318786, 339690, 531310, 690703, 796965, 1381406, 1593930, 2072109, 3453515, 4144218, 6907030, 10360545, 20721090]

約数ペア:

[(1, 20721090), (2, 10360545), (3, 6907030), (5, 4144218), (6, 3453515), (10, 2072109), (13, 1593930), (15, 1381406), (26, 796965), (30, 690703), (39, 531310), (61, 339690), (65, 318786), (67, 309270), (78, 265655), (122, 169845), (130, 159393), (134, 154635), (169, 122610), (183, 113230), (195, 106262), (201, 103090), (305, 67938), (335, 61854), (338, 61305), (366, 56615), (390, 53131), (402, 51545), (507, 40870), (610, 33969), (670, 30927), (793, 26130), (845, 24522), (871, 23790), (915, 22646), (1005, 20618), (1014, 20435), (1586, 13065), (1690, 12261), (1742, 11895), (1830, 11323), (2010, 10309), (2379, 8710), (2535, 8174), (2613, 7930), (3965, 5226), (4087, 5070), (4355, 4758)]