19788978

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 45287424

約数和(自身を除く): 25498446

約数列:

[1, 2, 3, 6, 11, 22, 33, 41, 66, 71, 82, 103, 123, 142, 206, 213, 246, 309, 426, 451, 618, 781, 902, 1133, 1353, 1562, 2266, 2343, 2706, 2911, 3399, 4223, 4686, 5822, 6798, 7313, 8446, 8733, 12669, 14626, 17466, 21939, 25338, 32021, 43878, 46453, 64042, 80443, 92906, 96063, 139359, 160886, 192126, 241329, 278718, 299833, 482658, 599666, 899499, 1798998, 3298163, 6596326, 9894489, 19788978]

約数ペア:

[(1, 19788978), (2, 9894489), (3, 6596326), (6, 3298163), (11, 1798998), (22, 899499), (33, 599666), (41, 482658), (66, 299833), (71, 278718), (82, 241329), (103, 192126), (123, 160886), (142, 139359), (206, 96063), (213, 92906), (246, 80443), (309, 64042), (426, 46453), (451, 43878), (618, 32021), (781, 25338), (902, 21939), (1133, 17466), (1353, 14626), (1562, 12669), (2266, 8733), (2343, 8446), (2706, 7313), (2911, 6798), (3399, 5822), (4223, 4686)]