25805440

素因数分解:

$2^7\times 5^1\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:741

約数の個数: 64

約数和(自身を含む): 62797320

約数和(自身を除く): 36991880

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, 661, 976, 1220, 1322, 1952, 2440, 2644, 3305, 3904, 4880, 5288, 6610, 7808, 9760, 10576, 13220, 19520, 21152, 26440, 39040, 40321, 42304, 52880, 80642, 84608, 105760, 161284, 201605, 211520, 322568, 403210, 423040, 645136, 806420, 1290272, 1612840, 2580544, 3225680, 5161088, 6451360, 12902720, 25805440]

約数ペア:

[(1, 25805440), (2, 12902720), (4, 6451360), (5, 5161088), (8, 3225680), (10, 2580544), (16, 1612840), (20, 1290272), (32, 806420), (40, 645136), (61, 423040), (64, 403210), (80, 322568), (122, 211520), (128, 201605), (160, 161284), (244, 105760), (305, 84608), (320, 80642), (488, 52880), (610, 42304), (640, 40321), (661, 39040), (976, 26440), (1220, 21152), (1322, 19520), (1952, 13220), (2440, 10576), (2644, 9760), (3305, 7808), (3904, 6610), (4880, 5288)]