21402400

素因数分解:

$2^5\times 5^2\times {\mathrm{31}}^1\times {\mathrm{863}}^1$

素因数の和:914

約数の個数: 72

約数和(自身を含む): 53996544

約数和(自身を除く): 32594144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 155, 160, 200, 248, 310, 400, 496, 620, 775, 800, 863, 992, 1240, 1550, 1726, 2480, 3100, 3452, 4315, 4960, 6200, 6904, 8630, 12400, 13808, 17260, 21575, 24800, 26753, 27616, 34520, 43150, 53506, 69040, 86300, 107012, 133765, 138080, 172600, 214024, 267530, 345200, 428048, 535060, 668825, 690400, 856096, 1070120, 1337650, 2140240, 2675300, 4280480, 5350600, 10701200, 21402400]

約数ペア:

[(1, 21402400), (2, 10701200), (4, 5350600), (5, 4280480), (8, 2675300), (10, 2140240), (16, 1337650), (20, 1070120), (25, 856096), (31, 690400), (32, 668825), (40, 535060), (50, 428048), (62, 345200), (80, 267530), (100, 214024), (124, 172600), (155, 138080), (160, 133765), (200, 107012), (248, 86300), (310, 69040), (400, 53506), (496, 43150), (620, 34520), (775, 27616), (800, 26753), (863, 24800), (992, 21575), (1240, 17260), (1550, 13808), (1726, 12400), (2480, 8630), (3100, 6904), (3452, 6200), (4315, 4960)]