21311766

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{331}}^1$

素因数の和:426

約数の個数: 72

約数和(自身を含む): 54614664

約数和(自身を除く): 33302898

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 73, 98, 126, 146, 147, 219, 294, 331, 438, 441, 511, 657, 662, 882, 993, 1022, 1314, 1533, 1986, 2317, 2979, 3066, 3577, 4599, 4634, 5958, 6951, 7154, 9198, 10731, 13902, 16219, 20853, 21462, 24163, 32193, 32438, 41706, 48326, 48657, 64386, 72489, 97314, 144978, 145971, 169141, 217467, 291942, 338282, 434934, 507423, 1014846, 1183987, 1522269, 2367974, 3044538, 3551961, 7103922, 10655883, 21311766]

約数ペア:

[(1, 21311766), (2, 10655883), (3, 7103922), (6, 3551961), (7, 3044538), (9, 2367974), (14, 1522269), (18, 1183987), (21, 1014846), (42, 507423), (49, 434934), (63, 338282), (73, 291942), (98, 217467), (126, 169141), (146, 145971), (147, 144978), (219, 97314), (294, 72489), (331, 64386), (438, 48657), (441, 48326), (511, 41706), (657, 32438), (662, 32193), (882, 24163), (993, 21462), (1022, 20853), (1314, 16219), (1533, 13902), (1986, 10731), (2317, 9198), (2979, 7154), (3066, 6951), (3577, 5958), (4599, 4634)]