21981726

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{181}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 53202240

約数和(自身を除く): 31220514

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 78, 117, 173, 181, 234, 346, 351, 362, 519, 543, 702, 1038, 1086, 1557, 1629, 2249, 2353, 3114, 3258, 4498, 4671, 4706, 4887, 6747, 7059, 9342, 9774, 13494, 14118, 20241, 21177, 31313, 40482, 42354, 60723, 62626, 63531, 93939, 121446, 127062, 187878, 281817, 407069, 563634, 814138, 845451, 1221207, 1690902, 2442414, 3663621, 7327242, 10990863, 21981726]

約数ペア:

[(1, 21981726), (2, 10990863), (3, 7327242), (6, 3663621), (9, 2442414), (13, 1690902), (18, 1221207), (26, 845451), (27, 814138), (39, 563634), (54, 407069), (78, 281817), (117, 187878), (173, 127062), (181, 121446), (234, 93939), (346, 63531), (351, 62626), (362, 60723), (519, 42354), (543, 40482), (702, 31313), (1038, 21177), (1086, 20241), (1557, 14118), (1629, 13494), (2249, 9774), (2353, 9342), (3114, 7059), (3258, 6747), (4498, 4887), (4671, 4706)]