28655720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{173}}^1$

素因数の和:326

約数の個数: 64

約数和(自身を含む): 67087440

約数和(自身を除く): 38431720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 101, 164, 173, 202, 205, 328, 346, 404, 410, 505, 692, 808, 820, 865, 1010, 1384, 1640, 1730, 2020, 3460, 4040, 4141, 6920, 7093, 8282, 14186, 16564, 17473, 20705, 28372, 33128, 34946, 35465, 41410, 56744, 69892, 70930, 82820, 87365, 139784, 141860, 165640, 174730, 283720, 349460, 698920, 716393, 1432786, 2865572, 3581965, 5731144, 7163930, 14327860, 28655720]

約数ペア:

[(1, 28655720), (2, 14327860), (4, 7163930), (5, 5731144), (8, 3581965), (10, 2865572), (20, 1432786), (40, 716393), (41, 698920), (82, 349460), (101, 283720), (164, 174730), (173, 165640), (202, 141860), (205, 139784), (328, 87365), (346, 82820), (404, 70930), (410, 69892), (505, 56744), (692, 41410), (808, 35465), (820, 34946), (865, 33128), (1010, 28372), (1384, 20705), (1640, 17473), (1730, 16564), (2020, 14186), (3460, 8282), (4040, 7093), (4141, 6920)]