19864120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{443}}^1$

素因数の和:532

約数の個数: 64

約数和(自身を含む): 47952000

約数和(自身を除く): 28087880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 59, 76, 95, 118, 152, 190, 236, 295, 380, 443, 472, 590, 760, 886, 1121, 1180, 1772, 2215, 2242, 2360, 3544, 4430, 4484, 5605, 8417, 8860, 8968, 11210, 16834, 17720, 22420, 26137, 33668, 42085, 44840, 52274, 67336, 84170, 104548, 130685, 168340, 209096, 261370, 336680, 496603, 522740, 993206, 1045480, 1986412, 2483015, 3972824, 4966030, 9932060, 19864120]

約数ペア:

[(1, 19864120), (2, 9932060), (4, 4966030), (5, 3972824), (8, 2483015), (10, 1986412), (19, 1045480), (20, 993206), (38, 522740), (40, 496603), (59, 336680), (76, 261370), (95, 209096), (118, 168340), (152, 130685), (190, 104548), (236, 84170), (295, 67336), (380, 52274), (443, 44840), (472, 42085), (590, 33668), (760, 26137), (886, 22420), (1121, 17720), (1180, 16834), (1772, 11210), (2215, 8968), (2242, 8860), (2360, 8417), (3544, 5605), (4430, 4484)]