19819980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{739}}^1$

素因数の和:903

約数の個数: 72

約数和(自身を含む): 60606000

約数和(自身を除く): 40786020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 149, 180, 298, 447, 596, 739, 745, 894, 1341, 1478, 1490, 1788, 2217, 2235, 2682, 2956, 2980, 3695, 4434, 4470, 5364, 6651, 6705, 7390, 8868, 8940, 11085, 13302, 13410, 14780, 22170, 26604, 26820, 33255, 44340, 66510, 110111, 133020, 220222, 330333, 440444, 550555, 660666, 990999, 1101110, 1321332, 1651665, 1981998, 2202220, 3303330, 3963996, 4954995, 6606660, 9909990, 19819980]

約数ペア:

[(1, 19819980), (2, 9909990), (3, 6606660), (4, 4954995), (5, 3963996), (6, 3303330), (9, 2202220), (10, 1981998), (12, 1651665), (15, 1321332), (18, 1101110), (20, 990999), (30, 660666), (36, 550555), (45, 440444), (60, 330333), (90, 220222), (149, 133020), (180, 110111), (298, 66510), (447, 44340), (596, 33255), (739, 26820), (745, 26604), (894, 22170), (1341, 14780), (1478, 13410), (1490, 13302), (1788, 11085), (2217, 8940), (2235, 8868), (2682, 7390), (2956, 6705), (2980, 6651), (3695, 5364), (4434, 4470)]