21121450

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{233}}^1$

素因数の和:296

約数の個数: 72

約数和(自身を含む): 47136492

約数和(自身を除く): 26015042

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 37, 49, 50, 70, 74, 98, 175, 185, 233, 245, 259, 350, 370, 466, 490, 518, 925, 1165, 1225, 1295, 1631, 1813, 1850, 2330, 2450, 2590, 3262, 3626, 5825, 6475, 8155, 8621, 9065, 11417, 11650, 12950, 16310, 17242, 18130, 22834, 40775, 43105, 45325, 57085, 60347, 81550, 86210, 90650, 114170, 120694, 215525, 285425, 301735, 422429, 431050, 570850, 603470, 844858, 1508675, 2112145, 3017350, 4224290, 10560725, 21121450]

約数ペア:

[(1, 21121450), (2, 10560725), (5, 4224290), (7, 3017350), (10, 2112145), (14, 1508675), (25, 844858), (35, 603470), (37, 570850), (49, 431050), (50, 422429), (70, 301735), (74, 285425), (98, 215525), (175, 120694), (185, 114170), (233, 90650), (245, 86210), (259, 81550), (350, 60347), (370, 57085), (466, 45325), (490, 43105), (518, 40775), (925, 22834), (1165, 18130), (1225, 17242), (1295, 16310), (1631, 12950), (1813, 11650), (1850, 11417), (2330, 9065), (2450, 8621), (2590, 8155), (3262, 6475), (3626, 5825)]