21016017

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{229}}^1$

素因数の和:355

約数の個数: 40

約数和(自身を含む): 34731840

約数和(自身を除く): 13715823

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 103, 229, 297, 309, 687, 891, 927, 1133, 2061, 2519, 2781, 3399, 6183, 7557, 8343, 10197, 18549, 22671, 23587, 30591, 68013, 70761, 91773, 204039, 212283, 259457, 636849, 778371, 1910547, 2335113, 7005339, 21016017]

約数ペア:

[(1, 21016017), (3, 7005339), (9, 2335113), (11, 1910547), (27, 778371), (33, 636849), (81, 259457), (99, 212283), (103, 204039), (229, 91773), (297, 70761), (309, 68013), (687, 30591), (891, 23587), (927, 22671), (1133, 18549), (2061, 10197), (2519, 8343), (2781, 7557), (3399, 6183)]