21004290

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:248

約数の個数: 96

約数和(自身を含む): 58181760

約数和(自身を除く): 37177470

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 23, 30, 45, 46, 69, 73, 90, 115, 138, 139, 146, 207, 219, 230, 278, 345, 365, 414, 417, 438, 657, 690, 695, 730, 834, 1035, 1095, 1251, 1314, 1390, 1679, 2070, 2085, 2190, 2502, 3197, 3285, 3358, 4170, 5037, 6255, 6394, 6570, 8395, 9591, 10074, 10147, 12510, 15111, 15985, 16790, 19182, 20294, 25185, 28773, 30222, 30441, 31970, 47955, 50370, 50735, 57546, 60882, 75555, 91323, 95910, 101470, 143865, 151110, 152205, 182646, 233381, 287730, 304410, 456615, 466762, 700143, 913230, 1166905, 1400286, 2100429, 2333810, 3500715, 4200858, 7001430, 10502145, 21004290]

約数ペア:

[(1, 21004290), (2, 10502145), (3, 7001430), (5, 4200858), (6, 3500715), (9, 2333810), (10, 2100429), (15, 1400286), (18, 1166905), (23, 913230), (30, 700143), (45, 466762), (46, 456615), (69, 304410), (73, 287730), (90, 233381), (115, 182646), (138, 152205), (139, 151110), (146, 143865), (207, 101470), (219, 95910), (230, 91323), (278, 75555), (345, 60882), (365, 57546), (414, 50735), (417, 50370), (438, 47955), (657, 31970), (690, 30441), (695, 30222), (730, 28773), (834, 25185), (1035, 20294), (1095, 19182), (1251, 16790), (1314, 15985), (1390, 15111), (1679, 12510), (2070, 10147), (2085, 10074), (2190, 9591), (2502, 8395), (3197, 6570), (3285, 6394), (3358, 6255), (4170, 5037)]