19804840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1$

素因数の和:167

約数の個数: 128

約数和(自身を含む): 53913600

約数和(自身を除く): 34108760

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 23, 38, 40, 44, 46, 55, 76, 88, 92, 95, 103, 110, 115, 152, 184, 190, 206, 209, 220, 230, 253, 380, 412, 418, 437, 440, 460, 506, 515, 760, 824, 836, 874, 920, 1012, 1030, 1045, 1133, 1265, 1672, 1748, 1957, 2024, 2060, 2090, 2185, 2266, 2369, 2530, 3496, 3914, 4120, 4180, 4370, 4532, 4738, 4807, 5060, 5665, 7828, 8360, 8740, 9064, 9476, 9614, 9785, 10120, 11330, 11845, 15656, 17480, 18952, 19228, 19570, 21527, 22660, 23690, 24035, 26059, 38456, 39140, 43054, 45011, 45320, 47380, 48070, 52118, 78280, 86108, 90022, 94760, 96140, 104236, 107635, 130295, 172216, 180044, 192280, 208472, 215270, 225055, 260590, 360088, 430540, 450110, 495121, 521180, 861080, 900220, 990242, 1042360, 1800440, 1980484, 2475605, 3960968, 4951210, 9902420, 19804840]

約数ペア:

[(1, 19804840), (2, 9902420), (4, 4951210), (5, 3960968), (8, 2475605), (10, 1980484), (11, 1800440), (19, 1042360), (20, 990242), (22, 900220), (23, 861080), (38, 521180), (40, 495121), (44, 450110), (46, 430540), (55, 360088), (76, 260590), (88, 225055), (92, 215270), (95, 208472), (103, 192280), (110, 180044), (115, 172216), (152, 130295), (184, 107635), (190, 104236), (206, 96140), (209, 94760), (220, 90022), (230, 86108), (253, 78280), (380, 52118), (412, 48070), (418, 47380), (437, 45320), (440, 45011), (460, 43054), (506, 39140), (515, 38456), (760, 26059), (824, 24035), (836, 23690), (874, 22660), (920, 21527), (1012, 19570), (1030, 19228), (1045, 18952), (1133, 17480), (1265, 15656), (1672, 11845), (1748, 11330), (1957, 10120), (2024, 9785), (2060, 9614), (2090, 9476), (2185, 9064), (2266, 8740), (2369, 8360), (2530, 7828), (3496, 5665), (3914, 5060), (4120, 4807), (4180, 4738), (4370, 4532)]