21851440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{21011}}^1$

素因数の和:21037

約数の個数: 40

約数和(自身を含む): 54715248

約数和(自身を除く): 32863808

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 21011, 42022, 84044, 105055, 168088, 210110, 273143, 336176, 420220, 546286, 840440, 1092572, 1365715, 1680880, 2185144, 2731430, 4370288, 5462860, 10925720, 21851440]

約数ペア:

[(1, 21851440), (2, 10925720), (4, 5462860), (5, 4370288), (8, 2731430), (10, 2185144), (13, 1680880), (16, 1365715), (20, 1092572), (26, 840440), (40, 546286), (52, 420220), (65, 336176), (80, 273143), (104, 210110), (130, 168088), (208, 105055), (260, 84044), (520, 42022), (1040, 21011)]