20560197

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{563}}^1$

素因数の和:657

約数の個数: 32

約数和(自身を含む): 32919552

約数和(自身を除く): 12359355

約数列:

[1, 3, 7, 21, 37, 47, 111, 141, 259, 329, 563, 777, 987, 1689, 1739, 3941, 5217, 11823, 12173, 20831, 26461, 36519, 62493, 79383, 145817, 185227, 437451, 555681, 979057, 2937171, 6853399, 20560197]

約数ペア:

[(1, 20560197), (3, 6853399), (7, 2937171), (21, 979057), (37, 555681), (47, 437451), (111, 185227), (141, 145817), (259, 79383), (329, 62493), (563, 36519), (777, 26461), (987, 20831), (1689, 12173), (1739, 11823), (3941, 5217)]