78002020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1\times {\mathrm{337}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 167626368

約数和(自身を除く): 89624348

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 163, 284, 326, 337, 355, 652, 674, 710, 815, 1348, 1420, 1630, 1685, 3260, 3370, 6740, 11573, 23146, 23927, 46292, 47854, 54931, 57865, 95708, 109862, 115730, 119635, 219724, 231460, 239270, 274655, 478540, 549310, 1098620, 3900101, 7800202, 15600404, 19500505, 39001010, 78002020]

約数ペア:

[(1, 78002020), (2, 39001010), (4, 19500505), (5, 15600404), (10, 7800202), (20, 3900101), (71, 1098620), (142, 549310), (163, 478540), (284, 274655), (326, 239270), (337, 231460), (355, 219724), (652, 119635), (674, 115730), (710, 109862), (815, 95708), (1348, 57865), (1420, 54931), (1630, 47854), (1685, 46292), (3260, 23927), (3370, 23146), (6740, 11573)]