21840280

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1013}}^1$

素因数の和:1049

約数の個数: 96

約数和(自身を含む): 62421840

約数和(自身を除く): 40581560

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 88, 98, 110, 140, 154, 196, 220, 245, 280, 308, 385, 392, 440, 490, 539, 616, 770, 980, 1013, 1078, 1540, 1960, 2026, 2156, 2695, 3080, 4052, 4312, 5065, 5390, 7091, 8104, 10130, 10780, 11143, 14182, 20260, 21560, 22286, 28364, 35455, 40520, 44572, 49637, 55715, 56728, 70910, 78001, 89144, 99274, 111430, 141820, 156002, 198548, 222860, 248185, 283640, 312004, 390005, 397096, 445720, 496370, 546007, 624008, 780010, 992740, 1092014, 1560020, 1985480, 2184028, 2730035, 3120040, 4368056, 5460070, 10920140, 21840280]

約数ペア:

[(1, 21840280), (2, 10920140), (4, 5460070), (5, 4368056), (7, 3120040), (8, 2730035), (10, 2184028), (11, 1985480), (14, 1560020), (20, 1092014), (22, 992740), (28, 780010), (35, 624008), (40, 546007), (44, 496370), (49, 445720), (55, 397096), (56, 390005), (70, 312004), (77, 283640), (88, 248185), (98, 222860), (110, 198548), (140, 156002), (154, 141820), (196, 111430), (220, 99274), (245, 89144), (280, 78001), (308, 70910), (385, 56728), (392, 55715), (440, 49637), (490, 44572), (539, 40520), (616, 35455), (770, 28364), (980, 22286), (1013, 21560), (1078, 20260), (1540, 14182), (1960, 11143), (2026, 10780), (2156, 10130), (2695, 8104), (3080, 7091), (4052, 5390), (4312, 5065)]