21052307960

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1789}}^1\times {\mathrm{2699}}^1$

素因数の和:4608

約数の個数: 64

約数和(自身を含む): 47846700000

約数和(自身を除く): 26794392040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 1789, 2180, 2699, 3578, 4360, 5398, 7156, 8945, 10796, 13495, 14312, 17890, 21592, 26990, 35780, 53980, 71560, 107960, 195001, 294191, 390002, 588382, 780004, 975005, 1176764, 1470955, 1560008, 1950010, 2353528, 2941910, 3900020, 4828511, 5883820, 7800040, 9657022, 11767640, 19314044, 24142555, 38628088, 48285110, 96570220, 193140440, 526307699, 1052615398, 2105230796, 2631538495, 4210461592, 5263076990, 10526153980, 21052307960]

約数ペア:

[(1, 21052307960), (2, 10526153980), (4, 5263076990), (5, 4210461592), (8, 2631538495), (10, 2105230796), (20, 1052615398), (40, 526307699), (109, 193140440), (218, 96570220), (436, 48285110), (545, 38628088), (872, 24142555), (1090, 19314044), (1789, 11767640), (2180, 9657022), (2699, 7800040), (3578, 5883820), (4360, 4828511), (5398, 3900020), (7156, 2941910), (8945, 2353528), (10796, 1950010), (13495, 1560008), (14312, 1470955), (17890, 1176764), (21592, 975005), (26990, 780004), (35780, 588382), (53980, 390002), (71560, 294191), (107960, 195001)]