20381620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{739}}^1$

素因数の和:952

約数の個数: 48

約数和(自身を含む): 49230720

約数和(自身を除く): 28849100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 739, 788, 985, 1379, 1478, 1970, 2758, 2956, 3695, 3940, 5173, 5516, 6895, 7390, 10346, 13790, 14780, 20692, 25865, 27580, 51730, 103460, 145583, 291166, 582332, 727915, 1019081, 1455830, 2038162, 2911660, 4076324, 5095405, 10190810, 20381620]

約数ペア:

[(1, 20381620), (2, 10190810), (4, 5095405), (5, 4076324), (7, 2911660), (10, 2038162), (14, 1455830), (20, 1019081), (28, 727915), (35, 582332), (70, 291166), (140, 145583), (197, 103460), (394, 51730), (739, 27580), (788, 25865), (985, 20692), (1379, 14780), (1478, 13790), (1970, 10346), (2758, 7390), (2956, 6895), (3695, 5516), (3940, 5173)]