21969560

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{241}}^1$

素因数の和:348

約数の個数: 64

約数和(自身を含む): 51749280

約数和(自身を除く): 29779720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 53, 86, 106, 172, 212, 215, 241, 265, 344, 424, 430, 482, 530, 860, 964, 1060, 1205, 1720, 1928, 2120, 2279, 2410, 4558, 4820, 9116, 9640, 10363, 11395, 12773, 18232, 20726, 22790, 25546, 41452, 45580, 51092, 51815, 63865, 82904, 91160, 102184, 103630, 127730, 207260, 255460, 414520, 510920, 549239, 1098478, 2196956, 2746195, 4393912, 5492390, 10984780, 21969560]

約数ペア:

[(1, 21969560), (2, 10984780), (4, 5492390), (5, 4393912), (8, 2746195), (10, 2196956), (20, 1098478), (40, 549239), (43, 510920), (53, 414520), (86, 255460), (106, 207260), (172, 127730), (212, 103630), (215, 102184), (241, 91160), (265, 82904), (344, 63865), (424, 51815), (430, 51092), (482, 45580), (530, 41452), (860, 25546), (964, 22790), (1060, 20726), (1205, 18232), (1720, 12773), (1928, 11395), (2120, 10363), (2279, 9640), (2410, 9116), (4558, 4820)]