21272960

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{773}}^1$

素因数の和:835

約数の個数: 64

約数和(自身を含む): 52105680

約数和(自身を除く): 30832720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 320, 344, 430, 640, 688, 773, 860, 1376, 1546, 1720, 2752, 3092, 3440, 3865, 5504, 6184, 6880, 7730, 12368, 13760, 15460, 24736, 27520, 30920, 33239, 49472, 61840, 66478, 98944, 123680, 132956, 166195, 247360, 265912, 332390, 494720, 531824, 664780, 1063648, 1329560, 2127296, 2659120, 4254592, 5318240, 10636480, 21272960]

約数ペア:

[(1, 21272960), (2, 10636480), (4, 5318240), (5, 4254592), (8, 2659120), (10, 2127296), (16, 1329560), (20, 1063648), (32, 664780), (40, 531824), (43, 494720), (64, 332390), (80, 265912), (86, 247360), (128, 166195), (160, 132956), (172, 123680), (215, 98944), (320, 66478), (344, 61840), (430, 49472), (640, 33239), (688, 30920), (773, 27520), (860, 24736), (1376, 15460), (1546, 13760), (1720, 12368), (2752, 7730), (3092, 6880), (3440, 6184), (3865, 5504)]