20570120

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7243}}^1$

素因数の和:7325

約数の個数: 32

約数和(自身を含む): 46941120

約数和(自身を除く): 26371000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7243, 14486, 28972, 36215, 57944, 72430, 144860, 289720, 514253, 1028506, 2057012, 2571265, 4114024, 5142530, 10285060, 20570120]

約数ペア:

[(1, 20570120), (2, 10285060), (4, 5142530), (5, 4114024), (8, 2571265), (10, 2057012), (20, 1028506), (40, 514253), (71, 289720), (142, 144860), (284, 72430), (355, 57944), (568, 36215), (710, 28972), (1420, 14486), (2840, 7243)]