200720020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{20357}}^1$

素因数の和:20412

約数の個数: 48

約数和(自身を含む): 461719440

約数和(自身を除く): 260999420

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 34, 58, 68, 85, 116, 145, 170, 290, 340, 493, 580, 986, 1972, 2465, 4930, 9860, 20357, 40714, 81428, 101785, 203570, 346069, 407140, 590353, 692138, 1180706, 1384276, 1730345, 2361412, 2951765, 3460690, 5903530, 6921380, 10036001, 11807060, 20072002, 40144004, 50180005, 100360010, 200720020]

約数ペア:

[(1, 200720020), (2, 100360010), (4, 50180005), (5, 40144004), (10, 20072002), (17, 11807060), (20, 10036001), (29, 6921380), (34, 5903530), (58, 3460690), (68, 2951765), (85, 2361412), (116, 1730345), (145, 1384276), (170, 1180706), (290, 692138), (340, 590353), (493, 407140), (580, 346069), (986, 203570), (1972, 101785), (2465, 81428), (4930, 40714), (9860, 20357)]