21458320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{439}}^1$

素因数の和:512

約数の個数: 80

約数和(自身を含む): 54996480

約数和(自身を除く): 33538160

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 47, 52, 65, 80, 94, 104, 130, 188, 208, 235, 260, 376, 439, 470, 520, 611, 752, 878, 940, 1040, 1222, 1756, 1880, 2195, 2444, 3055, 3512, 3760, 4390, 4888, 5707, 6110, 7024, 8780, 9776, 11414, 12220, 17560, 20633, 22828, 24440, 28535, 35120, 41266, 45656, 48880, 57070, 82532, 91312, 103165, 114140, 165064, 206330, 228280, 268229, 330128, 412660, 456560, 536458, 825320, 1072916, 1341145, 1650640, 2145832, 2682290, 4291664, 5364580, 10729160, 21458320]

約数ペア:

[(1, 21458320), (2, 10729160), (4, 5364580), (5, 4291664), (8, 2682290), (10, 2145832), (13, 1650640), (16, 1341145), (20, 1072916), (26, 825320), (40, 536458), (47, 456560), (52, 412660), (65, 330128), (80, 268229), (94, 228280), (104, 206330), (130, 165064), (188, 114140), (208, 103165), (235, 91312), (260, 82532), (376, 57070), (439, 48880), (470, 45656), (520, 41266), (611, 35120), (752, 28535), (878, 24440), (940, 22828), (1040, 20633), (1222, 17560), (1756, 12220), (1880, 11414), (2195, 9776), (2444, 8780), (3055, 7024), (3512, 6110), (3760, 5707), (4390, 4888)]