21178906

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:175

約数の個数: 64

約数和(自身を含む): 41430528

約数和(自身を除く): 20251622

約数列:

[1, 2, 7, 14, 17, 23, 34, 46, 53, 73, 106, 119, 146, 161, 238, 322, 371, 391, 511, 742, 782, 901, 1022, 1219, 1241, 1679, 1802, 2438, 2482, 2737, 3358, 3869, 5474, 6307, 7738, 8533, 8687, 11753, 12614, 17066, 17374, 20723, 23506, 27083, 28543, 41446, 54166, 57086, 65773, 88987, 131546, 145061, 177974, 199801, 290122, 399602, 460411, 622909, 920822, 1245818, 1512779, 3025558, 10589453, 21178906]

約数ペア:

[(1, 21178906), (2, 10589453), (7, 3025558), (14, 1512779), (17, 1245818), (23, 920822), (34, 622909), (46, 460411), (53, 399602), (73, 290122), (106, 199801), (119, 177974), (146, 145061), (161, 131546), (238, 88987), (322, 65773), (371, 57086), (391, 54166), (511, 41446), (742, 28543), (782, 27083), (901, 23506), (1022, 20723), (1219, 17374), (1241, 17066), (1679, 12614), (1802, 11753), (2438, 8687), (2482, 8533), (2737, 7738), (3358, 6307), (3869, 5474)]