19816980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{7681}}^1$

素因数の和:7736

約数の個数: 48

約数和(自身を含む): 56785344

約数和(自身を除く): 36968364

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 86, 129, 172, 215, 258, 430, 516, 645, 860, 1290, 2580, 7681, 15362, 23043, 30724, 38405, 46086, 76810, 92172, 115215, 153620, 230430, 330283, 460860, 660566, 990849, 1321132, 1651415, 1981698, 3302830, 3963396, 4954245, 6605660, 9908490, 19816980]

約数ペア:

[(1, 19816980), (2, 9908490), (3, 6605660), (4, 4954245), (5, 3963396), (6, 3302830), (10, 1981698), (12, 1651415), (15, 1321132), (20, 990849), (30, 660566), (43, 460860), (60, 330283), (86, 230430), (129, 153620), (172, 115215), (215, 92172), (258, 76810), (430, 46086), (516, 38405), (645, 30724), (860, 23043), (1290, 15362), (2580, 7681)]