21499220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1709}}^1$

素因数の和:1772

約数の個数: 48

約数和(自身を含む): 49124880

約数和(自身を除く): 27625660

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 37, 68, 74, 85, 148, 170, 185, 340, 370, 629, 740, 1258, 1709, 2516, 3145, 3418, 6290, 6836, 8545, 12580, 17090, 29053, 34180, 58106, 63233, 116212, 126466, 145265, 252932, 290530, 316165, 581060, 632330, 1074961, 1264660, 2149922, 4299844, 5374805, 10749610, 21499220]

約数ペア:

[(1, 21499220), (2, 10749610), (4, 5374805), (5, 4299844), (10, 2149922), (17, 1264660), (20, 1074961), (34, 632330), (37, 581060), (68, 316165), (74, 290530), (85, 252932), (148, 145265), (170, 126466), (185, 116212), (340, 63233), (370, 58106), (629, 34180), (740, 29053), (1258, 17090), (1709, 12580), (2516, 8545), (3145, 6836), (3418, 6290)]