21489740

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{359}}^1$

素因数の和:482

約数の個数: 48

約数和(自身を含む): 46992960

約数和(自身を除く): 25503220

約数列:

[1, 2, 4, 5, 10, 20, 41, 73, 82, 146, 164, 205, 292, 359, 365, 410, 718, 730, 820, 1436, 1460, 1795, 2993, 3590, 5986, 7180, 11972, 14719, 14965, 26207, 29438, 29930, 52414, 58876, 59860, 73595, 104828, 131035, 147190, 262070, 294380, 524140, 1074487, 2148974, 4297948, 5372435, 10744870, 21489740]

約数ペア:

[(1, 21489740), (2, 10744870), (4, 5372435), (5, 4297948), (10, 2148974), (20, 1074487), (41, 524140), (73, 294380), (82, 262070), (146, 147190), (164, 131035), (205, 104828), (292, 73595), (359, 59860), (365, 58876), (410, 52414), (718, 29930), (730, 29438), (820, 26207), (1436, 14965), (1460, 14719), (1795, 11972), (2993, 7180), (3590, 5986)]