21999780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{271}}^1$

素因数の和:338

約数の個数: 144

約数和(自身を含む): 74850048

約数和(自身を除く): 52850268

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 41, 44, 45, 55, 60, 66, 82, 90, 99, 110, 123, 132, 164, 165, 180, 198, 205, 220, 246, 271, 330, 369, 396, 410, 451, 492, 495, 542, 615, 660, 738, 813, 820, 902, 990, 1084, 1230, 1353, 1355, 1476, 1626, 1804, 1845, 1980, 2255, 2439, 2460, 2706, 2710, 2981, 3252, 3690, 4059, 4065, 4510, 4878, 5412, 5420, 5962, 6765, 7380, 8118, 8130, 8943, 9020, 9756, 11111, 11924, 12195, 13530, 14905, 16236, 16260, 17886, 20295, 22222, 24390, 26829, 27060, 29810, 33333, 35772, 40590, 44444, 44715, 48780, 53658, 55555, 59620, 66666, 81180, 89430, 99999, 107316, 111110, 122221, 133332, 134145, 166665, 178860, 199998, 222220, 244442, 268290, 333330, 366663, 399996, 488884, 499995, 536580, 611105, 666660, 733326, 999990, 1099989, 1222210, 1466652, 1833315, 1999980, 2199978, 2444420, 3666630, 4399956, 5499945, 7333260, 10999890, 21999780]

約数ペア:

[(1, 21999780), (2, 10999890), (3, 7333260), (4, 5499945), (5, 4399956), (6, 3666630), (9, 2444420), (10, 2199978), (11, 1999980), (12, 1833315), (15, 1466652), (18, 1222210), (20, 1099989), (22, 999990), (30, 733326), (33, 666660), (36, 611105), (41, 536580), (44, 499995), (45, 488884), (55, 399996), (60, 366663), (66, 333330), (82, 268290), (90, 244442), (99, 222220), (110, 199998), (123, 178860), (132, 166665), (164, 134145), (165, 133332), (180, 122221), (198, 111110), (205, 107316), (220, 99999), (246, 89430), (271, 81180), (330, 66666), (369, 59620), (396, 55555), (410, 53658), (451, 48780), (492, 44715), (495, 44444), (542, 40590), (615, 35772), (660, 33333), (738, 29810), (813, 27060), (820, 26829), (902, 24390), (990, 22222), (1084, 20295), (1230, 17886), (1353, 16260), (1355, 16236), (1476, 14905), (1626, 13530), (1804, 12195), (1845, 11924), (1980, 11111), (2255, 9756), (2439, 9020), (2460, 8943), (2706, 8130), (2710, 8118), (2981, 7380), (3252, 6765), (3690, 5962), (4059, 5420), (4065, 5412), (4510, 4878)]