12778880

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{487}}^1$

素因数の和:547

約数の個数: 64

約数和(自身を含む): 31358880

約数和(自身を除く): 18580000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 487, 640, 656, 820, 974, 1312, 1640, 1948, 2435, 2624, 3280, 3896, 4870, 5248, 6560, 7792, 9740, 13120, 15584, 19480, 19967, 26240, 31168, 38960, 39934, 62336, 77920, 79868, 99835, 155840, 159736, 199670, 311680, 319472, 399340, 638944, 798680, 1277888, 1597360, 2555776, 3194720, 6389440, 12778880]

約数ペア:

[(1, 12778880), (2, 6389440), (4, 3194720), (5, 2555776), (8, 1597360), (10, 1277888), (16, 798680), (20, 638944), (32, 399340), (40, 319472), (41, 311680), (64, 199670), (80, 159736), (82, 155840), (128, 99835), (160, 79868), (164, 77920), (205, 62336), (320, 39934), (328, 38960), (410, 31168), (487, 26240), (640, 19967), (656, 19480), (820, 15584), (974, 13120), (1312, 9740), (1640, 7792), (1948, 6560), (2435, 5248), (2624, 4870), (3280, 3896)]