19687120

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1$

素因数の和:212

約数の個数: 80

約数和(自身を含む): 48121920

約数和(自身を除く): 28434800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 59, 80, 86, 97, 118, 172, 194, 215, 236, 295, 344, 388, 430, 472, 485, 590, 688, 776, 860, 944, 970, 1180, 1552, 1720, 1940, 2360, 2537, 3440, 3880, 4171, 4720, 5074, 5723, 7760, 8342, 10148, 11446, 12685, 16684, 20296, 20855, 22892, 25370, 28615, 33368, 40592, 41710, 45784, 50740, 57230, 66736, 83420, 91568, 101480, 114460, 166840, 202960, 228920, 246089, 333680, 457840, 492178, 984356, 1230445, 1968712, 2460890, 3937424, 4921780, 9843560, 19687120]

約数ペア:

[(1, 19687120), (2, 9843560), (4, 4921780), (5, 3937424), (8, 2460890), (10, 1968712), (16, 1230445), (20, 984356), (40, 492178), (43, 457840), (59, 333680), (80, 246089), (86, 228920), (97, 202960), (118, 166840), (172, 114460), (194, 101480), (215, 91568), (236, 83420), (295, 66736), (344, 57230), (388, 50740), (430, 45784), (472, 41710), (485, 40592), (590, 33368), (688, 28615), (776, 25370), (860, 22892), (944, 20855), (970, 20296), (1180, 16684), (1552, 12685), (1720, 11446), (1940, 10148), (2360, 8342), (2537, 7760), (3440, 5723), (3880, 5074), (4171, 4720)]