19970964

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{307}}^1$

素因数の和:469

約数の個数: 72

約数和(自身を含む): 54934880

約数和(自身を除く): 34963916

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 139, 156, 234, 278, 307, 417, 468, 556, 614, 834, 921, 1228, 1251, 1668, 1807, 1842, 2502, 2763, 3614, 3684, 3991, 5004, 5421, 5526, 7228, 7982, 10842, 11052, 11973, 15964, 16263, 21684, 23946, 32526, 35919, 42673, 47892, 65052, 71838, 85346, 128019, 143676, 170692, 256038, 384057, 512076, 554749, 768114, 1109498, 1536228, 1664247, 2218996, 3328494, 4992741, 6656988, 9985482, 19970964]

約数ペア:

[(1, 19970964), (2, 9985482), (3, 6656988), (4, 4992741), (6, 3328494), (9, 2218996), (12, 1664247), (13, 1536228), (18, 1109498), (26, 768114), (36, 554749), (39, 512076), (52, 384057), (78, 256038), (117, 170692), (139, 143676), (156, 128019), (234, 85346), (278, 71838), (307, 65052), (417, 47892), (468, 42673), (556, 35919), (614, 32526), (834, 23946), (921, 21684), (1228, 16263), (1251, 15964), (1668, 11973), (1807, 11052), (1842, 10842), (2502, 7982), (2763, 7228), (3614, 5526), (3684, 5421), (3991, 5004)]