21204045

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6829}}^1$

素因数の和:6866

約数の個数: 32

約数和(自身を含む): 39340800

約数和(自身を除く): 18136755

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6829, 20487, 34145, 61461, 102435, 157067, 184383, 307305, 471201, 785335, 921915, 1413603, 2356005, 4240809, 7068015, 21204045]

約数ペア:

[(1, 21204045), (3, 7068015), (5, 4240809), (9, 2356005), (15, 1413603), (23, 921915), (27, 785335), (45, 471201), (69, 307305), (115, 184383), (135, 157067), (207, 102435), (345, 61461), (621, 34145), (1035, 20487), (3105, 6829)]