81719720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{1117}}^1$

素因数の和:1218

約数の個数: 64

約数和(自身を含む): 193190400

約数和(自身を除く): 111470680

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 59, 62, 118, 124, 155, 236, 248, 295, 310, 472, 590, 620, 1117, 1180, 1240, 1829, 2234, 2360, 3658, 4468, 5585, 7316, 8936, 9145, 11170, 14632, 18290, 22340, 34627, 36580, 44680, 65903, 69254, 73160, 131806, 138508, 173135, 263612, 277016, 329515, 346270, 527224, 659030, 692540, 1318060, 1385080, 2042993, 2636120, 4085986, 8171972, 10214965, 16343944, 20429930, 40859860, 81719720]

約数ペア:

[(1, 81719720), (2, 40859860), (4, 20429930), (5, 16343944), (8, 10214965), (10, 8171972), (20, 4085986), (31, 2636120), (40, 2042993), (59, 1385080), (62, 1318060), (118, 692540), (124, 659030), (155, 527224), (236, 346270), (248, 329515), (295, 277016), (310, 263612), (472, 173135), (590, 138508), (620, 131806), (1117, 73160), (1180, 69254), (1240, 65903), (1829, 44680), (2234, 36580), (2360, 34627), (3658, 22340), (4468, 18290), (5585, 14632), (7316, 11170), (8936, 9145)]