21203440

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3733}}^1$

素因数の和:3817

約数の個数: 40

約数和(自身を含む): 50005728

約数和(自身を除く): 28802288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3733, 5680, 7466, 14932, 18665, 29864, 37330, 59728, 74660, 149320, 265043, 298640, 530086, 1060172, 1325215, 2120344, 2650430, 4240688, 5300860, 10601720, 21203440]

約数ペア:

[(1, 21203440), (2, 10601720), (4, 5300860), (5, 4240688), (8, 2650430), (10, 2120344), (16, 1325215), (20, 1060172), (40, 530086), (71, 298640), (80, 265043), (142, 149320), (284, 74660), (355, 59728), (568, 37330), (710, 29864), (1136, 18665), (1420, 14932), (2840, 7466), (3733, 5680)]