21850880

素因数分解:

$2^8\times 5^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:461

約数の個数: 72

約数和(自身を含む): 53691792

約数和(自身を除く): 31840912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 256, 320, 344, 397, 430, 640, 688, 794, 860, 1280, 1376, 1588, 1720, 1985, 2752, 3176, 3440, 3970, 5504, 6352, 6880, 7940, 11008, 12704, 13760, 15880, 17071, 25408, 27520, 31760, 34142, 50816, 55040, 63520, 68284, 85355, 101632, 127040, 136568, 170710, 254080, 273136, 341420, 508160, 546272, 682840, 1092544, 1365680, 2185088, 2731360, 4370176, 5462720, 10925440, 21850880]

約数ペア:

[(1, 21850880), (2, 10925440), (4, 5462720), (5, 4370176), (8, 2731360), (10, 2185088), (16, 1365680), (20, 1092544), (32, 682840), (40, 546272), (43, 508160), (64, 341420), (80, 273136), (86, 254080), (128, 170710), (160, 136568), (172, 127040), (215, 101632), (256, 85355), (320, 68284), (344, 63520), (397, 55040), (430, 50816), (640, 34142), (688, 31760), (794, 27520), (860, 25408), (1280, 17071), (1376, 15880), (1588, 13760), (1720, 12704), (1985, 11008), (2752, 7940), (3176, 6880), (3440, 6352), (3970, 5504)]