20215720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:203

約数の個数: 128

約数和(自身を含む): 57231360

約数和(自身を除く): 37015640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 31, 34, 35, 40, 56, 62, 68, 70, 85, 119, 124, 136, 137, 140, 155, 170, 217, 238, 248, 274, 280, 310, 340, 434, 476, 527, 548, 595, 620, 680, 685, 868, 952, 959, 1054, 1085, 1096, 1190, 1240, 1370, 1736, 1918, 2108, 2170, 2329, 2380, 2635, 2740, 3689, 3836, 4216, 4247, 4340, 4658, 4760, 4795, 5270, 5480, 7378, 7672, 8494, 8680, 9316, 9590, 10540, 11645, 14756, 16303, 16988, 18445, 18632, 19180, 21080, 21235, 23290, 29512, 29729, 32606, 33976, 36890, 38360, 42470, 46580, 59458, 65212, 72199, 73780, 81515, 84940, 93160, 118916, 130424, 144398, 147560, 148645, 163030, 169880, 237832, 288796, 297290, 326060, 360995, 505393, 577592, 594580, 652120, 721990, 1010786, 1189160, 1443980, 2021572, 2526965, 2887960, 4043144, 5053930, 10107860, 20215720]

約数ペア:

[(1, 20215720), (2, 10107860), (4, 5053930), (5, 4043144), (7, 2887960), (8, 2526965), (10, 2021572), (14, 1443980), (17, 1189160), (20, 1010786), (28, 721990), (31, 652120), (34, 594580), (35, 577592), (40, 505393), (56, 360995), (62, 326060), (68, 297290), (70, 288796), (85, 237832), (119, 169880), (124, 163030), (136, 148645), (137, 147560), (140, 144398), (155, 130424), (170, 118916), (217, 93160), (238, 84940), (248, 81515), (274, 73780), (280, 72199), (310, 65212), (340, 59458), (434, 46580), (476, 42470), (527, 38360), (548, 36890), (595, 33976), (620, 32606), (680, 29729), (685, 29512), (868, 23290), (952, 21235), (959, 21080), (1054, 19180), (1085, 18632), (1096, 18445), (1190, 16988), (1240, 16303), (1370, 14756), (1736, 11645), (1918, 10540), (2108, 9590), (2170, 9316), (2329, 8680), (2380, 8494), (2635, 7672), (2740, 7378), (3689, 5480), (3836, 5270), (4216, 4795), (4247, 4760), (4340, 4658)]