21891436

素因数分解:

$2^2\times 7^2\times {\mathrm{61}}^1\times {\mathrm{1831}}^1$

素因数の和:1910

約数の個数: 36

約数和(自身を含む): 45320016

約数和(自身を除く): 23428580

約数列:

[1, 2, 4, 7, 14, 28, 49, 61, 98, 122, 196, 244, 427, 854, 1708, 1831, 2989, 3662, 5978, 7324, 11956, 12817, 25634, 51268, 89719, 111691, 179438, 223382, 358876, 446764, 781837, 1563674, 3127348, 5472859, 10945718, 21891436]

約数ペア:

[(1, 21891436), (2, 10945718), (4, 5472859), (7, 3127348), (14, 1563674), (28, 781837), (49, 446764), (61, 358876), (98, 223382), (122, 179438), (196, 111691), (244, 89719), (427, 51268), (854, 25634), (1708, 12817), (1831, 11956), (2989, 7324), (3662, 5978)]