18880940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{719}}^1$

素因数の和:842

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 24301780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 101, 130, 202, 260, 404, 505, 719, 1010, 1313, 1438, 2020, 2626, 2876, 3595, 5252, 6565, 7190, 9347, 13130, 14380, 18694, 26260, 37388, 46735, 72619, 93470, 145238, 186940, 290476, 363095, 726190, 944047, 1452380, 1888094, 3776188, 4720235, 9440470, 18880940]

約数ペア:

[(1, 18880940), (2, 9440470), (4, 4720235), (5, 3776188), (10, 1888094), (13, 1452380), (20, 944047), (26, 726190), (52, 363095), (65, 290476), (101, 186940), (130, 145238), (202, 93470), (260, 72619), (404, 46735), (505, 37388), (719, 26260), (1010, 18694), (1313, 14380), (1438, 13130), (2020, 9347), (2626, 7190), (2876, 6565), (3595, 5252)]