20865800

素因数分解:

$2^3\times 5^2\times {\mathrm{17}}^2\times {\mathrm{19}}^2$

素因数の和:88

約数の個数: 108

約数和(自身を含む): 54389655

約数和(自身を除く): 33523855

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 25, 34, 38, 40, 50, 68, 76, 85, 95, 100, 136, 152, 170, 190, 200, 289, 323, 340, 361, 380, 425, 475, 578, 646, 680, 722, 760, 850, 950, 1156, 1292, 1444, 1445, 1615, 1700, 1805, 1900, 2312, 2584, 2888, 2890, 3230, 3400, 3610, 3800, 5491, 5780, 6137, 6460, 7220, 7225, 8075, 9025, 10982, 11560, 12274, 12920, 14440, 14450, 16150, 18050, 21964, 24548, 27455, 28900, 30685, 32300, 36100, 43928, 49096, 54910, 57800, 61370, 64600, 72200, 104329, 109820, 122740, 137275, 153425, 208658, 219640, 245480, 274550, 306850, 417316, 521645, 549100, 613700, 834632, 1043290, 1098200, 1227400, 2086580, 2608225, 4173160, 5216450, 10432900, 20865800]

約数ペア:

[(1, 20865800), (2, 10432900), (4, 5216450), (5, 4173160), (8, 2608225), (10, 2086580), (17, 1227400), (19, 1098200), (20, 1043290), (25, 834632), (34, 613700), (38, 549100), (40, 521645), (50, 417316), (68, 306850), (76, 274550), (85, 245480), (95, 219640), (100, 208658), (136, 153425), (152, 137275), (170, 122740), (190, 109820), (200, 104329), (289, 72200), (323, 64600), (340, 61370), (361, 57800), (380, 54910), (425, 49096), (475, 43928), (578, 36100), (646, 32300), (680, 30685), (722, 28900), (760, 27455), (850, 24548), (950, 21964), (1156, 18050), (1292, 16150), (1444, 14450), (1445, 14440), (1615, 12920), (1700, 12274), (1805, 11560), (1900, 10982), (2312, 9025), (2584, 8075), (2888, 7225), (2890, 7220), (3230, 6460), (3400, 6137), (3610, 5780), (3800, 5491)]