21015220

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{15683}}^1$

素因数の和:15759

約数の個数: 24

約数和(自身を含む): 44793504

約数和(自身を除く): 23778284

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 15683, 31366, 62732, 78415, 156830, 313660, 1050761, 2101522, 4203044, 5253805, 10507610, 21015220]

約数ペア:

[(1, 21015220), (2, 10507610), (4, 5253805), (5, 4203044), (10, 2101522), (20, 1050761), (67, 313660), (134, 156830), (268, 78415), (335, 62732), (670, 31366), (1340, 15683)]