21384657

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{487}}^1$

素因数の和:558

約数の個数: 48

約数和(自身を含む): 38368512

約数和(自身を除く): 16983855

約数列:

[1, 3, 7, 9, 17, 21, 41, 51, 63, 119, 123, 153, 287, 357, 369, 487, 697, 861, 1071, 1461, 2091, 2583, 3409, 4383, 4879, 6273, 8279, 10227, 14637, 19967, 24837, 30681, 43911, 57953, 59901, 74511, 139769, 173859, 179703, 339439, 419307, 521577, 1018317, 1257921, 2376073, 3054951, 7128219, 21384657]

約数ペア:

[(1, 21384657), (3, 7128219), (7, 3054951), (9, 2376073), (17, 1257921), (21, 1018317), (41, 521577), (51, 419307), (63, 339439), (119, 179703), (123, 173859), (153, 139769), (287, 74511), (357, 59901), (369, 57953), (487, 43911), (697, 30681), (861, 24837), (1071, 19967), (1461, 14637), (2091, 10227), (2583, 8279), (3409, 6273), (4383, 4879)]