21285836

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1$

素因数の和:255

約数の個数: 72

約数和(自身を含む): 46922400

約数和(自身を除く): 25636564

約数列:

[1, 2, 4, 11, 13, 17, 22, 26, 34, 44, 52, 68, 121, 143, 187, 199, 221, 242, 286, 374, 398, 442, 484, 572, 748, 796, 884, 1573, 2057, 2189, 2431, 2587, 3146, 3383, 4114, 4378, 4862, 5174, 6292, 6766, 8228, 8756, 9724, 10348, 13532, 24079, 26741, 28457, 37213, 43979, 48158, 53482, 56914, 74426, 87958, 96316, 106964, 113828, 148852, 175916, 313027, 409343, 483769, 626054, 818686, 967538, 1252108, 1637372, 1935076, 5321459, 10642918, 21285836]

約数ペア:

[(1, 21285836), (2, 10642918), (4, 5321459), (11, 1935076), (13, 1637372), (17, 1252108), (22, 967538), (26, 818686), (34, 626054), (44, 483769), (52, 409343), (68, 313027), (121, 175916), (143, 148852), (187, 113828), (199, 106964), (221, 96316), (242, 87958), (286, 74426), (374, 56914), (398, 53482), (442, 48158), (484, 43979), (572, 37213), (748, 28457), (796, 26741), (884, 24079), (1573, 13532), (2057, 10348), (2189, 9724), (2431, 8756), (2587, 8228), (3146, 6766), (3383, 6292), (4114, 5174), (4378, 4862)]