20643880

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1181}}^1$

素因数の和:1234

約数の個数: 64

約数和(自身を含む): 51062400

約数和(自身を除く): 30418520

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 23, 38, 40, 46, 76, 92, 95, 115, 152, 184, 190, 230, 380, 437, 460, 760, 874, 920, 1181, 1748, 2185, 2362, 3496, 4370, 4724, 5905, 8740, 9448, 11810, 17480, 22439, 23620, 27163, 44878, 47240, 54326, 89756, 108652, 112195, 135815, 179512, 217304, 224390, 271630, 448780, 516097, 543260, 897560, 1032194, 1086520, 2064388, 2580485, 4128776, 5160970, 10321940, 20643880]

約数ペア:

[(1, 20643880), (2, 10321940), (4, 5160970), (5, 4128776), (8, 2580485), (10, 2064388), (19, 1086520), (20, 1032194), (23, 897560), (38, 543260), (40, 516097), (46, 448780), (76, 271630), (92, 224390), (95, 217304), (115, 179512), (152, 135815), (184, 112195), (190, 108652), (230, 89756), (380, 54326), (437, 47240), (460, 44878), (760, 27163), (874, 23620), (920, 22439), (1181, 17480), (1748, 11810), (2185, 9448), (2362, 8740), (3496, 5905), (4370, 4724)]