21151028

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 40824000

約数和(自身を除く): 19672972

約数列:

[1, 2, 4, 19, 38, 53, 59, 76, 89, 106, 118, 178, 212, 236, 356, 1007, 1121, 1691, 2014, 2242, 3127, 3382, 4028, 4484, 4717, 5251, 6254, 6764, 9434, 10502, 12508, 18868, 21004, 59413, 89623, 99769, 118826, 179246, 199538, 237652, 278303, 358492, 399076, 556606, 1113212, 5287757, 10575514, 21151028]

約数ペア:

[(1, 21151028), (2, 10575514), (4, 5287757), (19, 1113212), (38, 556606), (53, 399076), (59, 358492), (76, 278303), (89, 237652), (106, 199538), (118, 179246), (178, 118826), (212, 99769), (236, 89623), (356, 59413), (1007, 21004), (1121, 18868), (1691, 12508), (2014, 10502), (2242, 9434), (3127, 6764), (3382, 6254), (4028, 5251), (4484, 4717)]