21783640

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{211}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 51516000

約数和(自身を除く): 29732360

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 89, 116, 145, 178, 211, 232, 290, 356, 422, 445, 580, 712, 844, 890, 1055, 1160, 1688, 1780, 2110, 2581, 3560, 4220, 5162, 6119, 8440, 10324, 12238, 12905, 18779, 20648, 24476, 25810, 30595, 37558, 48952, 51620, 61190, 75116, 93895, 103240, 122380, 150232, 187790, 244760, 375580, 544591, 751160, 1089182, 2178364, 2722955, 4356728, 5445910, 10891820, 21783640]

約数ペア:

[(1, 21783640), (2, 10891820), (4, 5445910), (5, 4356728), (8, 2722955), (10, 2178364), (20, 1089182), (29, 751160), (40, 544591), (58, 375580), (89, 244760), (116, 187790), (145, 150232), (178, 122380), (211, 103240), (232, 93895), (290, 75116), (356, 61190), (422, 51620), (445, 48952), (580, 37558), (712, 30595), (844, 25810), (890, 24476), (1055, 20648), (1160, 18779), (1688, 12905), (1780, 12238), (2110, 10324), (2581, 8440), (3560, 6119), (4220, 5162)]