20345000

素因数分解:

$2^3\times 5^4\times {\mathrm{13}}^1\times {\mathrm{313}}^1$

素因数の和:352

約数の個数: 80

約数和(自身を含む): 51499140

約数和(自身を除く): 31154140

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 313, 325, 500, 520, 625, 626, 650, 1000, 1250, 1252, 1300, 1565, 1625, 2500, 2504, 2600, 3130, 3250, 4069, 5000, 6260, 6500, 7825, 8125, 8138, 12520, 13000, 15650, 16250, 16276, 20345, 31300, 32500, 32552, 39125, 40690, 62600, 65000, 78250, 81380, 101725, 156500, 162760, 195625, 203450, 313000, 391250, 406900, 508625, 782500, 813800, 1017250, 1565000, 2034500, 2543125, 4069000, 5086250, 10172500, 20345000]

約数ペア:

[(1, 20345000), (2, 10172500), (4, 5086250), (5, 4069000), (8, 2543125), (10, 2034500), (13, 1565000), (20, 1017250), (25, 813800), (26, 782500), (40, 508625), (50, 406900), (52, 391250), (65, 313000), (100, 203450), (104, 195625), (125, 162760), (130, 156500), (200, 101725), (250, 81380), (260, 78250), (313, 65000), (325, 62600), (500, 40690), (520, 39125), (625, 32552), (626, 32500), (650, 31300), (1000, 20345), (1250, 16276), (1252, 16250), (1300, 15650), (1565, 13000), (1625, 12520), (2500, 8138), (2504, 8125), (2600, 7825), (3130, 6500), (3250, 6260), (4069, 5000)]