21130736

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:198

約数の個数: 80

約数和(自身を含む): 48211200

約数和(自身を除く): 27080464

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 44, 71, 76, 88, 89, 142, 152, 176, 178, 209, 284, 304, 356, 418, 568, 712, 781, 836, 979, 1136, 1349, 1424, 1562, 1672, 1691, 1958, 2698, 3124, 3344, 3382, 3916, 5396, 6248, 6319, 6764, 7832, 10792, 12496, 12638, 13528, 14839, 15664, 18601, 21584, 25276, 27056, 29678, 37202, 50552, 59356, 69509, 74404, 101104, 118712, 120061, 139018, 148808, 237424, 240122, 278036, 297616, 480244, 556072, 960488, 1112144, 1320671, 1920976, 2641342, 5282684, 10565368, 21130736]

約数ペア:

[(1, 21130736), (2, 10565368), (4, 5282684), (8, 2641342), (11, 1920976), (16, 1320671), (19, 1112144), (22, 960488), (38, 556072), (44, 480244), (71, 297616), (76, 278036), (88, 240122), (89, 237424), (142, 148808), (152, 139018), (176, 120061), (178, 118712), (209, 101104), (284, 74404), (304, 69509), (356, 59356), (418, 50552), (568, 37202), (712, 29678), (781, 27056), (836, 25276), (979, 21584), (1136, 18601), (1349, 15664), (1424, 14839), (1562, 13528), (1672, 12638), (1691, 12496), (1958, 10792), (2698, 7832), (3124, 6764), (3344, 6319), (3382, 6248), (3916, 5396)]