21139768

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 45158400

約数和(自身を除く): 24018632

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 79, 83, 104, 124, 158, 166, 248, 316, 332, 403, 632, 664, 806, 1027, 1079, 1612, 2054, 2158, 2449, 2573, 3224, 4108, 4316, 4898, 5146, 6557, 8216, 8632, 9796, 10292, 13114, 19592, 20584, 26228, 31837, 33449, 52456, 63674, 66898, 85241, 127348, 133796, 170482, 203267, 254696, 267592, 340964, 406534, 681928, 813068, 1626136, 2642471, 5284942, 10569884, 21139768]

約数ペア:

[(1, 21139768), (2, 10569884), (4, 5284942), (8, 2642471), (13, 1626136), (26, 813068), (31, 681928), (52, 406534), (62, 340964), (79, 267592), (83, 254696), (104, 203267), (124, 170482), (158, 133796), (166, 127348), (248, 85241), (316, 66898), (332, 63674), (403, 52456), (632, 33449), (664, 31837), (806, 26228), (1027, 20584), (1079, 19592), (1612, 13114), (2054, 10292), (2158, 9796), (2449, 8632), (2573, 8216), (3224, 6557), (4108, 5146), (4316, 4898)]