19973223

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:257

約数の個数: 40

約数和(自身を含む): 31781376

約数和(自身を除く): 11808153

約数列:

[1, 3, 9, 23, 27, 69, 71, 81, 151, 207, 213, 453, 621, 639, 1359, 1633, 1863, 1917, 3473, 4077, 4899, 5751, 10419, 10721, 12231, 14697, 31257, 32163, 44091, 93771, 96489, 132273, 246583, 281313, 289467, 739749, 868401, 2219247, 6657741, 19973223]

約数ペア:

[(1, 19973223), (3, 6657741), (9, 2219247), (23, 868401), (27, 739749), (69, 289467), (71, 281313), (81, 246583), (151, 132273), (207, 96489), (213, 93771), (453, 44091), (621, 32163), (639, 31257), (1359, 14697), (1633, 12231), (1863, 10721), (1917, 10419), (3473, 5751), (4077, 4899)]