21279200

素因数分解:

$2^5\times 5^2\times {\mathrm{67}}^1\times {\mathrm{397}}^1$

素因数の和:484

約数の個数: 72

約数和(自身を含む): 52855992

約数和(自身を除く): 31576792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 67, 80, 100, 134, 160, 200, 268, 335, 397, 400, 536, 670, 794, 800, 1072, 1340, 1588, 1675, 1985, 2144, 2680, 3176, 3350, 3970, 5360, 6352, 6700, 7940, 9925, 10720, 12704, 13400, 15880, 19850, 26599, 26800, 31760, 39700, 53198, 53600, 63520, 79400, 106396, 132995, 158800, 212792, 265990, 317600, 425584, 531980, 664975, 851168, 1063960, 1329950, 2127920, 2659900, 4255840, 5319800, 10639600, 21279200]

約数ペア:

[(1, 21279200), (2, 10639600), (4, 5319800), (5, 4255840), (8, 2659900), (10, 2127920), (16, 1329950), (20, 1063960), (25, 851168), (32, 664975), (40, 531980), (50, 425584), (67, 317600), (80, 265990), (100, 212792), (134, 158800), (160, 132995), (200, 106396), (268, 79400), (335, 63520), (397, 53600), (400, 53198), (536, 39700), (670, 31760), (794, 26800), (800, 26599), (1072, 19850), (1340, 15880), (1588, 13400), (1675, 12704), (1985, 10720), (2144, 9925), (2680, 7940), (3176, 6700), (3350, 6352), (3970, 5360)]