21284680

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{277}}^1$

素因数の和:418

約数の個数: 64

約数和(自身を含む): 51341040

約数和(自身を除く): 30056360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 113, 136, 170, 226, 277, 340, 452, 554, 565, 680, 904, 1108, 1130, 1385, 1921, 2216, 2260, 2770, 3842, 4520, 4709, 5540, 7684, 9418, 9605, 11080, 15368, 18836, 19210, 23545, 31301, 37672, 38420, 47090, 62602, 76840, 94180, 125204, 156505, 188360, 250408, 313010, 532117, 626020, 1064234, 1252040, 2128468, 2660585, 4256936, 5321170, 10642340, 21284680]

約数ペア:

[(1, 21284680), (2, 10642340), (4, 5321170), (5, 4256936), (8, 2660585), (10, 2128468), (17, 1252040), (20, 1064234), (34, 626020), (40, 532117), (68, 313010), (85, 250408), (113, 188360), (136, 156505), (170, 125204), (226, 94180), (277, 76840), (340, 62602), (452, 47090), (554, 38420), (565, 37672), (680, 31301), (904, 23545), (1108, 19210), (1130, 18836), (1385, 15368), (1921, 11080), (2216, 9605), (2260, 9418), (2770, 7684), (3842, 5540), (4520, 4709)]