21820760

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1447}}^1$

素因数の和:1500

約数の個数: 64

約数和(自身を含む): 54734400

約数和(自身を除く): 32913640

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 29, 40, 52, 58, 65, 104, 116, 130, 145, 232, 260, 290, 377, 520, 580, 754, 1160, 1447, 1508, 1885, 2894, 3016, 3770, 5788, 7235, 7540, 11576, 14470, 15080, 18811, 28940, 37622, 41963, 57880, 75244, 83926, 94055, 150488, 167852, 188110, 209815, 335704, 376220, 419630, 545519, 752440, 839260, 1091038, 1678520, 2182076, 2727595, 4364152, 5455190, 10910380, 21820760]

約数ペア:

[(1, 21820760), (2, 10910380), (4, 5455190), (5, 4364152), (8, 2727595), (10, 2182076), (13, 1678520), (20, 1091038), (26, 839260), (29, 752440), (40, 545519), (52, 419630), (58, 376220), (65, 335704), (104, 209815), (116, 188110), (130, 167852), (145, 150488), (232, 94055), (260, 83926), (290, 75244), (377, 57880), (520, 41963), (580, 37622), (754, 28940), (1160, 18811), (1447, 15080), (1508, 14470), (1885, 11576), (2894, 7540), (3016, 7235), (3770, 5788)]