215465740

素因数分解:

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

素因数の和:685

約数の個数: 72

約数和(自身を含む): 528710112

約数和(自身を除く): 313244372

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, 16807, 17948, 22435, 24010, 31409, 33614, 44870, 48020, 62818, 67228, 84035, 89740, 125636, 157045, 168070, 219863, 314090, 336140, 439726, 628180, 879452, 1099315, 1539041, 2198630, 3078082, 4397260, 6156164, 7695205, 10773287, 15390410, 21546574, 30780820, 43093148, 53866435, 107732870, 215465740]

約数ペア:

[(1, 215465740), (2, 107732870), (4, 53866435), (5, 43093148), (7, 30780820), (10, 21546574), (14, 15390410), (20, 10773287), (28, 7695205), (35, 6156164), (49, 4397260), (70, 3078082), (98, 2198630), (140, 1539041), (196, 1099315), (245, 879452), (343, 628180), (490, 439726), (641, 336140), (686, 314090), (980, 219863), (1282, 168070), (1372, 157045), (1715, 125636), (2401, 89740), (2564, 84035), (3205, 67228), (3430, 62818), (4487, 48020), (4802, 44870), (6410, 33614), (6860, 31409), (8974, 24010), (9604, 22435), (12005, 17948), (12820, 16807)]