18734420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{293}}^1$

素因数の和:464

約数の個数: 48

約数和(自身を含む): 41489280

約数和(自身を除く): 22754860

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 139, 230, 278, 293, 460, 556, 586, 695, 1172, 1390, 1465, 2780, 2930, 3197, 5860, 6394, 6739, 12788, 13478, 15985, 26956, 31970, 33695, 40727, 63940, 67390, 81454, 134780, 162908, 203635, 407270, 814540, 936721, 1873442, 3746884, 4683605, 9367210, 18734420]

約数ペア:

[(1, 18734420), (2, 9367210), (4, 4683605), (5, 3746884), (10, 1873442), (20, 936721), (23, 814540), (46, 407270), (92, 203635), (115, 162908), (139, 134780), (230, 81454), (278, 67390), (293, 63940), (460, 40727), (556, 33695), (586, 31970), (695, 26956), (1172, 15985), (1390, 13478), (1465, 12788), (2780, 6739), (2930, 6394), (3197, 5860)]