21006220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1993}}^1$

素因数の和:2050

約数の個数: 48

約数和(自身を含む): 48238848

約数和(自身を除く): 27232628

約数列:

[1, 2, 4, 5, 10, 17, 20, 31, 34, 62, 68, 85, 124, 155, 170, 310, 340, 527, 620, 1054, 1993, 2108, 2635, 3986, 5270, 7972, 9965, 10540, 19930, 33881, 39860, 61783, 67762, 123566, 135524, 169405, 247132, 308915, 338810, 617830, 677620, 1050311, 1235660, 2100622, 4201244, 5251555, 10503110, 21006220]

約数ペア:

[(1, 21006220), (2, 10503110), (4, 5251555), (5, 4201244), (10, 2100622), (17, 1235660), (20, 1050311), (31, 677620), (34, 617830), (62, 338810), (68, 308915), (85, 247132), (124, 169405), (155, 135524), (170, 123566), (310, 67762), (340, 61783), (527, 39860), (620, 33881), (1054, 19930), (1993, 10540), (2108, 9965), (2635, 7972), (3986, 5270)]