21071310

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{557}}^1$

素因数の和:677

約数の個数: 64

約数和(自身を含む): 55121472

約数和(自身を除く): 34050162

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 97, 130, 194, 195, 291, 390, 485, 557, 582, 970, 1114, 1261, 1455, 1671, 2522, 2785, 2910, 3342, 3783, 5570, 6305, 7241, 7566, 8355, 12610, 14482, 16710, 18915, 21723, 36205, 37830, 43446, 54029, 72410, 108058, 108615, 162087, 217230, 270145, 324174, 540290, 702377, 810435, 1404754, 1620870, 2107131, 3511885, 4214262, 7023770, 10535655, 21071310]

約数ペア:

[(1, 21071310), (2, 10535655), (3, 7023770), (5, 4214262), (6, 3511885), (10, 2107131), (13, 1620870), (15, 1404754), (26, 810435), (30, 702377), (39, 540290), (65, 324174), (78, 270145), (97, 217230), (130, 162087), (194, 108615), (195, 108058), (291, 72410), (390, 54029), (485, 43446), (557, 37830), (582, 36205), (970, 21723), (1114, 18915), (1261, 16710), (1455, 14482), (1671, 12610), (2522, 8355), (2785, 7566), (2910, 7241), (3342, 6305), (3783, 5570)]