20381570

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 22196350

約数列:

[1, 2, 5, 10, 11, 22, 31, 43, 55, 62, 86, 110, 139, 155, 215, 278, 310, 341, 430, 473, 682, 695, 946, 1333, 1390, 1529, 1705, 2365, 2666, 3058, 3410, 4309, 4730, 5977, 6665, 7645, 8618, 11954, 13330, 14663, 15290, 21545, 29326, 29885, 43090, 47399, 59770, 65747, 73315, 94798, 131494, 146630, 185287, 236995, 328735, 370574, 473990, 657470, 926435, 1852870, 2038157, 4076314, 10190785, 20381570]

約数ペア:

[(1, 20381570), (2, 10190785), (5, 4076314), (10, 2038157), (11, 1852870), (22, 926435), (31, 657470), (43, 473990), (55, 370574), (62, 328735), (86, 236995), (110, 185287), (139, 146630), (155, 131494), (215, 94798), (278, 73315), (310, 65747), (341, 59770), (430, 47399), (473, 43090), (682, 29885), (695, 29326), (946, 21545), (1333, 15290), (1390, 14663), (1529, 13330), (1705, 11954), (2365, 8618), (2666, 7645), (3058, 6665), (3410, 5977), (4309, 4730)]