20616729

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{317}}^1$

素因数の和:509

約数の個数: 32

約数和(自身を含む): 33377280

約数和(自身を除く): 12760551

約数列:

[1, 3, 7, 19, 21, 57, 133, 163, 317, 399, 489, 951, 1141, 2219, 3097, 3423, 6023, 6657, 9291, 18069, 21679, 42161, 51671, 65037, 126483, 155013, 361697, 981749, 1085091, 2945247, 6872243, 20616729]

約数ペア:

[(1, 20616729), (3, 6872243), (7, 2945247), (19, 1085091), (21, 981749), (57, 361697), (133, 155013), (163, 126483), (317, 65037), (399, 51671), (489, 42161), (951, 21679), (1141, 18069), (2219, 9291), (3097, 6657), (3423, 6023)]