80201920

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{641}}^1$

素因数の和:698

約数の個数: 112

約数和(自身を含む): 211336128

約数和(自身を除く): 131134208

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 32, 34, 40, 46, 64, 68, 80, 85, 92, 115, 136, 160, 170, 184, 230, 272, 320, 340, 368, 391, 460, 544, 641, 680, 736, 782, 920, 1088, 1282, 1360, 1472, 1564, 1840, 1955, 2564, 2720, 3128, 3205, 3680, 3910, 5128, 5440, 6256, 6410, 7360, 7820, 10256, 10897, 12512, 12820, 14743, 15640, 20512, 21794, 25024, 25640, 29486, 31280, 41024, 43588, 51280, 54485, 58972, 62560, 73715, 87176, 102560, 108970, 117944, 125120, 147430, 174352, 205120, 217940, 235888, 250631, 294860, 348704, 435880, 471776, 501262, 589720, 697408, 871760, 943552, 1002524, 1179440, 1253155, 1743520, 2005048, 2358880, 2506310, 3487040, 4010096, 4717760, 5012620, 8020192, 10025240, 16040384, 20050480, 40100960, 80201920]

約数ペア:

[(1, 80201920), (2, 40100960), (4, 20050480), (5, 16040384), (8, 10025240), (10, 8020192), (16, 5012620), (17, 4717760), (20, 4010096), (23, 3487040), (32, 2506310), (34, 2358880), (40, 2005048), (46, 1743520), (64, 1253155), (68, 1179440), (80, 1002524), (85, 943552), (92, 871760), (115, 697408), (136, 589720), (160, 501262), (170, 471776), (184, 435880), (230, 348704), (272, 294860), (320, 250631), (340, 235888), (368, 217940), (391, 205120), (460, 174352), (544, 147430), (641, 125120), (680, 117944), (736, 108970), (782, 102560), (920, 87176), (1088, 73715), (1282, 62560), (1360, 58972), (1472, 54485), (1564, 51280), (1840, 43588), (1955, 41024), (2564, 31280), (2720, 29486), (3128, 25640), (3205, 25024), (3680, 21794), (3910, 20512), (5128, 15640), (5440, 14743), (6256, 12820), (6410, 12512), (7360, 10897), (7820, 10256)]