20187075

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 35997696

約数和(自身を除く): 15810621

約数列:

[1, 3, 5, 15, 17, 25, 51, 71, 75, 85, 213, 223, 255, 355, 425, 669, 1065, 1115, 1207, 1275, 1775, 3345, 3621, 3791, 5325, 5575, 6035, 11373, 15833, 16725, 18105, 18955, 30175, 47499, 56865, 79165, 90525, 94775, 237495, 269161, 284325, 395825, 807483, 1187475, 1345805, 4037415, 6729025, 20187075]

約数ペア:

[(1, 20187075), (3, 6729025), (5, 4037415), (15, 1345805), (17, 1187475), (25, 807483), (51, 395825), (71, 284325), (75, 269161), (85, 237495), (213, 94775), (223, 90525), (255, 79165), (355, 56865), (425, 47499), (669, 30175), (1065, 18955), (1115, 18105), (1207, 16725), (1275, 15833), (1775, 11373), (3345, 6035), (3621, 5575), (3791, 5325)]