31780040

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:354

約数の個数: 64

約数和(自身を含む): 74487600

約数和(自身を除く): 42707560

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 109, 148, 185, 197, 218, 296, 370, 394, 436, 545, 740, 788, 872, 985, 1090, 1480, 1576, 1970, 2180, 3940, 4033, 4360, 7289, 7880, 8066, 14578, 16132, 20165, 21473, 29156, 32264, 36445, 40330, 42946, 58312, 72890, 80660, 85892, 107365, 145780, 161320, 171784, 214730, 291560, 429460, 794501, 858920, 1589002, 3178004, 3972505, 6356008, 7945010, 15890020, 31780040]

約数ペア:

[(1, 31780040), (2, 15890020), (4, 7945010), (5, 6356008), (8, 3972505), (10, 3178004), (20, 1589002), (37, 858920), (40, 794501), (74, 429460), (109, 291560), (148, 214730), (185, 171784), (197, 161320), (218, 145780), (296, 107365), (370, 85892), (394, 80660), (436, 72890), (545, 58312), (740, 42946), (788, 40330), (872, 36445), (985, 32264), (1090, 29156), (1480, 21473), (1576, 20165), (1970, 16132), (2180, 14578), (3940, 8066), (4033, 7880), (4360, 7289)]