20210008

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:137

約数の個数: 128

約数和(自身を含む): 52254720

約数和(自身を除く): 32044712

約数列:

[1, 2, 4, 7, 8, 13, 14, 17, 23, 26, 28, 34, 46, 52, 56, 68, 71, 91, 92, 104, 119, 136, 142, 161, 182, 184, 221, 238, 284, 299, 322, 364, 391, 442, 476, 497, 568, 598, 644, 728, 782, 884, 923, 952, 994, 1196, 1207, 1288, 1547, 1564, 1633, 1768, 1846, 1988, 2093, 2392, 2414, 2737, 3094, 3128, 3266, 3692, 3976, 4186, 4828, 5083, 5474, 6188, 6461, 6532, 7384, 8372, 8449, 9656, 10166, 10948, 11431, 12376, 12922, 13064, 15691, 16744, 16898, 20332, 21229, 21896, 22862, 25844, 27761, 31382, 33796, 35581, 40664, 42458, 45724, 51688, 55522, 62764, 67592, 71162, 84916, 91448, 109837, 111044, 125528, 142324, 148603, 169832, 194327, 219674, 222088, 284648, 297206, 360893, 388654, 439348, 594412, 721786, 777308, 878696, 1188824, 1443572, 1554616, 2526251, 2887144, 5052502, 10105004, 20210008]

約数ペア:

[(1, 20210008), (2, 10105004), (4, 5052502), (7, 2887144), (8, 2526251), (13, 1554616), (14, 1443572), (17, 1188824), (23, 878696), (26, 777308), (28, 721786), (34, 594412), (46, 439348), (52, 388654), (56, 360893), (68, 297206), (71, 284648), (91, 222088), (92, 219674), (104, 194327), (119, 169832), (136, 148603), (142, 142324), (161, 125528), (182, 111044), (184, 109837), (221, 91448), (238, 84916), (284, 71162), (299, 67592), (322, 62764), (364, 55522), (391, 51688), (442, 45724), (476, 42458), (497, 40664), (568, 35581), (598, 33796), (644, 31382), (728, 27761), (782, 25844), (884, 22862), (923, 21896), (952, 21229), (994, 20332), (1196, 16898), (1207, 16744), (1288, 15691), (1547, 13064), (1564, 12922), (1633, 12376), (1768, 11431), (1846, 10948), (1988, 10166), (2093, 9656), (2392, 8449), (2414, 8372), (2737, 7384), (3094, 6532), (3128, 6461), (3266, 6188), (3692, 5474), (3976, 5083), (4186, 4828)]