25258880

素因数分解:

$2^7\times 5^1\times {\mathrm{61}}^1\times {\mathrm{647}}^1$

素因数の和:727

約数の個数: 64

約数和(自身を含む): 61469280

約数和(自身を除く): 36210400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 305, 320, 488, 610, 640, 647, 976, 1220, 1294, 1952, 2440, 2588, 3235, 3904, 4880, 5176, 6470, 7808, 9760, 10352, 12940, 19520, 20704, 25880, 39040, 39467, 41408, 51760, 78934, 82816, 103520, 157868, 197335, 207040, 315736, 394670, 414080, 631472, 789340, 1262944, 1578680, 2525888, 3157360, 5051776, 6314720, 12629440, 25258880]

約数ペア:

[(1, 25258880), (2, 12629440), (4, 6314720), (5, 5051776), (8, 3157360), (10, 2525888), (16, 1578680), (20, 1262944), (32, 789340), (40, 631472), (61, 414080), (64, 394670), (80, 315736), (122, 207040), (128, 197335), (160, 157868), (244, 103520), (305, 82816), (320, 78934), (488, 51760), (610, 41408), (640, 39467), (647, 39040), (976, 25880), (1220, 20704), (1294, 19520), (1952, 12940), (2440, 10352), (2588, 9760), (3235, 7808), (3904, 6470), (4880, 5176)]