30780820

素因数分解:

$2^2\times 5^1\times 7^4\times {\mathrm{641}}^1$

素因数の和:678

約数の個数: 60

約数和(自身を含む): 75526164

約数和(自身を除く): 44745344

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 641, 686, 980, 1282, 1372, 1715, 2401, 2564, 3205, 3430, 4487, 4802, 6410, 6860, 8974, 9604, 12005, 12820, 17948, 22435, 24010, 31409, 44870, 48020, 62818, 89740, 125636, 157045, 219863, 314090, 439726, 628180, 879452, 1099315, 1539041, 2198630, 3078082, 4397260, 6156164, 7695205, 15390410, 30780820]

約数ペア:

[(1, 30780820), (2, 15390410), (4, 7695205), (5, 6156164), (7, 4397260), (10, 3078082), (14, 2198630), (20, 1539041), (28, 1099315), (35, 879452), (49, 628180), (70, 439726), (98, 314090), (140, 219863), (196, 157045), (245, 125636), (343, 89740), (490, 62818), (641, 48020), (686, 44870), (980, 31409), (1282, 24010), (1372, 22435), (1715, 17948), (2401, 12820), (2564, 12005), (3205, 9604), (3430, 8974), (4487, 6860), (4802, 6410)]