21158020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4283}}^1$

素因数の和:4324

約数の個数: 48

約数和(自身を含む): 50379840

約数和(自身を除く): 29221820

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4283, 4940, 8566, 17132, 21415, 42830, 55679, 81377, 85660, 111358, 162754, 222716, 278395, 325508, 406885, 556790, 813770, 1057901, 1113580, 1627540, 2115802, 4231604, 5289505, 10579010, 21158020]

約数ペア:

[(1, 21158020), (2, 10579010), (4, 5289505), (5, 4231604), (10, 2115802), (13, 1627540), (19, 1113580), (20, 1057901), (26, 813770), (38, 556790), (52, 406885), (65, 325508), (76, 278395), (95, 222716), (130, 162754), (190, 111358), (247, 85660), (260, 81377), (380, 55679), (494, 42830), (988, 21415), (1235, 17132), (2470, 8566), (4283, 4940)]