21140216

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{683}}^1$

素因数の和:815

約数の個数: 32

約数和(自身を含む): 40998960

約数和(自身を除く): 19858744

約数列:

[1, 2, 4, 8, 53, 73, 106, 146, 212, 292, 424, 584, 683, 1366, 2732, 3869, 5464, 7738, 15476, 30952, 36199, 49859, 72398, 99718, 144796, 199436, 289592, 398872, 2642527, 5285054, 10570108, 21140216]

約数ペア:

[(1, 21140216), (2, 10570108), (4, 5285054), (8, 2642527), (53, 398872), (73, 289592), (106, 199436), (146, 144796), (212, 99718), (292, 72398), (424, 49859), (584, 36199), (683, 30952), (1366, 15476), (2732, 7738), (3869, 5464)]