19700560

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{367}}^1$

素因数の和:452

約数の個数: 80

約数和(自身を含む): 50925312

約数和(自身を除く): 31224752

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 61, 80, 88, 110, 122, 176, 220, 244, 305, 367, 440, 488, 610, 671, 734, 880, 976, 1220, 1342, 1468, 1835, 2440, 2684, 2936, 3355, 3670, 4037, 4880, 5368, 5872, 6710, 7340, 8074, 10736, 13420, 14680, 16148, 20185, 22387, 26840, 29360, 32296, 40370, 44774, 53680, 64592, 80740, 89548, 111935, 161480, 179096, 223870, 246257, 322960, 358192, 447740, 492514, 895480, 985028, 1231285, 1790960, 1970056, 2462570, 3940112, 4925140, 9850280, 19700560]

約数ペア:

[(1, 19700560), (2, 9850280), (4, 4925140), (5, 3940112), (8, 2462570), (10, 1970056), (11, 1790960), (16, 1231285), (20, 985028), (22, 895480), (40, 492514), (44, 447740), (55, 358192), (61, 322960), (80, 246257), (88, 223870), (110, 179096), (122, 161480), (176, 111935), (220, 89548), (244, 80740), (305, 64592), (367, 53680), (440, 44774), (488, 40370), (610, 32296), (671, 29360), (734, 26840), (880, 22387), (976, 20185), (1220, 16148), (1342, 14680), (1468, 13420), (1835, 10736), (2440, 8074), (2684, 7340), (2936, 6710), (3355, 5872), (3670, 5368), (4037, 4880)]