21204885

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2939}}^1$

素因数の和:2997

約数の個数: 32

約数和(自身を含む): 37537920

約数和(自身を除く): 16333035

約数列:

[1, 3, 5, 13, 15, 37, 39, 65, 111, 185, 195, 481, 555, 1443, 2405, 2939, 7215, 8817, 14695, 38207, 44085, 108743, 114621, 191035, 326229, 543715, 573105, 1413659, 1631145, 4240977, 7068295, 21204885]

約数ペア:

[(1, 21204885), (3, 7068295), (5, 4240977), (13, 1631145), (15, 1413659), (37, 573105), (39, 543715), (65, 326229), (111, 191035), (185, 114621), (195, 108743), (481, 44085), (555, 38207), (1443, 14695), (2405, 8817), (2939, 7215)]