813800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{313}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 2044140

約数和(自身を除く): 1230340

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 313, 325, 520, 626, 650, 1252, 1300, 1565, 2504, 2600, 3130, 4069, 6260, 7825, 8138, 12520, 15650, 16276, 20345, 31300, 32552, 40690, 62600, 81380, 101725, 162760, 203450, 406900, 813800]

約数ペア:

[(1, 813800), (2, 406900), (4, 203450), (5, 162760), (8, 101725), (10, 81380), (13, 62600), (20, 40690), (25, 32552), (26, 31300), (40, 20345), (50, 16276), (52, 15650), (65, 12520), (100, 8138), (104, 7825), (130, 6260), (200, 4069), (260, 3130), (313, 2600), (325, 2504), (520, 1565), (626, 1300), (650, 1252)]