21724521

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 39223296

約数和(自身を除く): 17498775

約数列:

[1, 3, 7, 13, 17, 21, 31, 39, 51, 91, 93, 119, 151, 217, 221, 273, 357, 403, 453, 527, 651, 663, 1057, 1209, 1547, 1581, 1963, 2567, 2821, 3171, 3689, 4641, 4681, 5889, 6851, 7701, 8463, 11067, 13741, 14043, 17969, 20553, 32767, 33371, 41223, 47957, 53907, 60853, 79577, 98301, 100113, 143871, 182559, 233597, 238731, 425971, 557039, 700791, 1034501, 1277913, 1671117, 3103503, 7241507, 21724521]

約数ペア:

[(1, 21724521), (3, 7241507), (7, 3103503), (13, 1671117), (17, 1277913), (21, 1034501), (31, 700791), (39, 557039), (51, 425971), (91, 238731), (93, 233597), (119, 182559), (151, 143871), (217, 100113), (221, 98301), (273, 79577), (357, 60853), (403, 53907), (453, 47957), (527, 41223), (651, 33371), (663, 32767), (1057, 20553), (1209, 17969), (1547, 14043), (1581, 13741), (1963, 11067), (2567, 8463), (2821, 7701), (3171, 6851), (3689, 5889), (4641, 4681)]