289487780

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{211}}^1\times {\mathrm{379}}^1$

素因数の和:780

約数の個数: 48

約数和(自身を含む): 615800640

約数和(自身を除く): 326312860

約数列:

[1, 2, 4, 5, 10, 20, 181, 211, 362, 379, 422, 724, 758, 844, 905, 1055, 1516, 1810, 1895, 2110, 3620, 3790, 4220, 7580, 38191, 68599, 76382, 79969, 137198, 152764, 159938, 190955, 274396, 319876, 342995, 381910, 399845, 685990, 763820, 799690, 1371980, 1599380, 14474389, 28948778, 57897556, 72371945, 144743890, 289487780]

約数ペア:

[(1, 289487780), (2, 144743890), (4, 72371945), (5, 57897556), (10, 28948778), (20, 14474389), (181, 1599380), (211, 1371980), (362, 799690), (379, 763820), (422, 685990), (724, 399845), (758, 381910), (844, 342995), (905, 319876), (1055, 274396), (1516, 190955), (1810, 159938), (1895, 152764), (2110, 137198), (3620, 79969), (3790, 76382), (4220, 68599), (7580, 38191)]