21699380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1129}}^1$

素因数の和:1200

約数の個数: 36

約数和(自身を含む): 47127780

約数和(自身を除く): 25428400

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1129, 1922, 2258, 3844, 4516, 4805, 5645, 9610, 11290, 19220, 22580, 34999, 69998, 139996, 174995, 349990, 699980, 1084969, 2169938, 4339876, 5424845, 10849690, 21699380]

約数ペア:

[(1, 21699380), (2, 10849690), (4, 5424845), (5, 4339876), (10, 2169938), (20, 1084969), (31, 699980), (62, 349990), (124, 174995), (155, 139996), (310, 69998), (620, 34999), (961, 22580), (1129, 19220), (1922, 11290), (2258, 9610), (3844, 5645), (4516, 4805)]