21137805

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1571}}^1$

素因数の和:1618

約数の個数: 48

約数和(自身を含む): 41198976

約数和(自身を除く): 20061171

約数列:

[1, 3, 5, 9, 13, 15, 23, 39, 45, 65, 69, 115, 117, 195, 207, 299, 345, 585, 897, 1035, 1495, 1571, 2691, 4485, 4713, 7855, 13455, 14139, 20423, 23565, 36133, 61269, 70695, 102115, 108399, 180665, 183807, 306345, 325197, 469729, 541995, 919035, 1409187, 1625985, 2348645, 4227561, 7045935, 21137805]

約数ペア:

[(1, 21137805), (3, 7045935), (5, 4227561), (9, 2348645), (13, 1625985), (15, 1409187), (23, 919035), (39, 541995), (45, 469729), (65, 325197), (69, 306345), (115, 183807), (117, 180665), (195, 108399), (207, 102115), (299, 70695), (345, 61269), (585, 36133), (897, 23565), (1035, 20423), (1495, 14139), (1571, 13455), (2691, 7855), (4485, 4713)]