20748780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{8867}}^1$

素因数の和:8895

約数の個数: 72

約数和(自身を含む): 67786992

約数和(自身を除く): 47038212

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340, 8867, 17734, 26601, 35468, 44335, 53202, 79803, 88670, 106404, 115271, 133005, 159606, 177340, 230542, 266010, 319212, 345813, 399015, 461084, 532020, 576355, 691626, 798030, 1037439, 1152710, 1383252, 1596060, 1729065, 2074878, 2305420, 3458130, 4149756, 5187195, 6916260, 10374390, 20748780]

約数ペア:

[(1, 20748780), (2, 10374390), (3, 6916260), (4, 5187195), (5, 4149756), (6, 3458130), (9, 2305420), (10, 2074878), (12, 1729065), (13, 1596060), (15, 1383252), (18, 1152710), (20, 1037439), (26, 798030), (30, 691626), (36, 576355), (39, 532020), (45, 461084), (52, 399015), (60, 345813), (65, 319212), (78, 266010), (90, 230542), (117, 177340), (130, 159606), (156, 133005), (180, 115271), (195, 106404), (234, 88670), (260, 79803), (390, 53202), (468, 44335), (585, 35468), (780, 26601), (1170, 17734), (2340, 8867)]