20720600

素因数分解:

$2^3\times 5^2\times {\mathrm{313}}^1\times {\mathrm{331}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 48475320

約数和(自身を除く): 27754720

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 313, 331, 626, 662, 1252, 1324, 1565, 1655, 2504, 2648, 3130, 3310, 6260, 6620, 7825, 8275, 12520, 13240, 15650, 16550, 31300, 33100, 62600, 66200, 103603, 207206, 414412, 518015, 828824, 1036030, 2072060, 2590075, 4144120, 5180150, 10360300, 20720600]

約数ペア:

[(1, 20720600), (2, 10360300), (4, 5180150), (5, 4144120), (8, 2590075), (10, 2072060), (20, 1036030), (25, 828824), (40, 518015), (50, 414412), (100, 207206), (200, 103603), (313, 66200), (331, 62600), (626, 33100), (662, 31300), (1252, 16550), (1324, 15650), (1565, 13240), (1655, 12520), (2504, 8275), (2648, 7825), (3130, 6620), (3310, 6260)]