21485200

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1$

素因数の和:305

約数の個数: 120

約数和(自身を含む): 59505120

約数和(自身を除く): 38019920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 25, 38, 40, 44, 50, 55, 76, 80, 88, 95, 100, 110, 152, 176, 190, 200, 209, 220, 257, 275, 304, 380, 400, 418, 440, 475, 514, 550, 760, 836, 880, 950, 1028, 1045, 1100, 1285, 1520, 1672, 1900, 2056, 2090, 2200, 2570, 2827, 3344, 3800, 4112, 4180, 4400, 4883, 5140, 5225, 5654, 6425, 7600, 8360, 9766, 10280, 10450, 11308, 12850, 14135, 16720, 19532, 20560, 20900, 22616, 24415, 25700, 28270, 39064, 41800, 45232, 48830, 51400, 53713, 56540, 70675, 78128, 83600, 97660, 102800, 107426, 113080, 122075, 141350, 195320, 214852, 226160, 244150, 268565, 282700, 390640, 429704, 488300, 537130, 565400, 859408, 976600, 1074260, 1130800, 1342825, 1953200, 2148520, 2685650, 4297040, 5371300, 10742600, 21485200]

約数ペア:

[(1, 21485200), (2, 10742600), (4, 5371300), (5, 4297040), (8, 2685650), (10, 2148520), (11, 1953200), (16, 1342825), (19, 1130800), (20, 1074260), (22, 976600), (25, 859408), (38, 565400), (40, 537130), (44, 488300), (50, 429704), (55, 390640), (76, 282700), (80, 268565), (88, 244150), (95, 226160), (100, 214852), (110, 195320), (152, 141350), (176, 122075), (190, 113080), (200, 107426), (209, 102800), (220, 97660), (257, 83600), (275, 78128), (304, 70675), (380, 56540), (400, 53713), (418, 51400), (440, 48830), (475, 45232), (514, 41800), (550, 39064), (760, 28270), (836, 25700), (880, 24415), (950, 22616), (1028, 20900), (1045, 20560), (1100, 19532), (1285, 16720), (1520, 14135), (1672, 12850), (1900, 11308), (2056, 10450), (2090, 10280), (2200, 9766), (2570, 8360), (2827, 7600), (3344, 6425), (3800, 5654), (4112, 5225), (4180, 5140), (4400, 4883)]