18952020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{499}}^1$

素因数の和:725

約数の個数: 72

約数和(自身を含む): 57876000

約数和(自身を除く): 38923980

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 211, 422, 499, 633, 844, 998, 1055, 1266, 1497, 1899, 1996, 2110, 2495, 2532, 2994, 3165, 3798, 4220, 4491, 4990, 5988, 6330, 7485, 7596, 8982, 9495, 9980, 12660, 14970, 17964, 18990, 22455, 29940, 37980, 44910, 89820, 105289, 210578, 315867, 421156, 526445, 631734, 947601, 1052890, 1263468, 1579335, 1895202, 2105780, 3158670, 3790404, 4738005, 6317340, 9476010, 18952020]

約数ペア:

[(1, 18952020), (2, 9476010), (3, 6317340), (4, 4738005), (5, 3790404), (6, 3158670), (9, 2105780), (10, 1895202), (12, 1579335), (15, 1263468), (18, 1052890), (20, 947601), (30, 631734), (36, 526445), (45, 421156), (60, 315867), (90, 210578), (180, 105289), (211, 89820), (422, 44910), (499, 37980), (633, 29940), (844, 22455), (998, 18990), (1055, 17964), (1266, 14970), (1497, 12660), (1899, 9980), (1996, 9495), (2110, 8982), (2495, 7596), (2532, 7485), (2994, 6330), (3165, 5988), (3798, 4990), (4220, 4491)]