215304873

素因数分解:

$3^1\times 7^4\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:523

約数の個数: 40

約数和(自身を含む): 340422336

約数和(自身を除く): 125117463

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 343, 421, 497, 1029, 1263, 1491, 2401, 2947, 3479, 7203, 8841, 10437, 20629, 24353, 29891, 61887, 73059, 89673, 144403, 170471, 209237, 433209, 511413, 627711, 1010821, 1464659, 3032463, 4393977, 10252613, 30757839, 71768291, 215304873]

約数ペア:

[(1, 215304873), (3, 71768291), (7, 30757839), (21, 10252613), (49, 4393977), (71, 3032463), (147, 1464659), (213, 1010821), (343, 627711), (421, 511413), (497, 433209), (1029, 209237), (1263, 170471), (1491, 144403), (2401, 89673), (2947, 73059), (3479, 61887), (7203, 29891), (8841, 24353), (10437, 20629)]