21491280

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1571}}^1$

素因数の和:1609

約数の個数: 120

約数和(自身を含む): 76021920

約数和(自身を除く): 54530640

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 30, 36, 38, 40, 45, 48, 57, 60, 72, 76, 80, 90, 95, 114, 120, 144, 152, 171, 180, 190, 228, 240, 285, 304, 342, 360, 380, 456, 570, 684, 720, 760, 855, 912, 1140, 1368, 1520, 1571, 1710, 2280, 2736, 3142, 3420, 4560, 4713, 6284, 6840, 7855, 9426, 12568, 13680, 14139, 15710, 18852, 23565, 25136, 28278, 29849, 31420, 37704, 47130, 56556, 59698, 62840, 70695, 75408, 89547, 94260, 113112, 119396, 125680, 141390, 149245, 179094, 188520, 226224, 238792, 268641, 282780, 298490, 358188, 377040, 447735, 477584, 537282, 565560, 596980, 716376, 895470, 1074564, 1131120, 1193960, 1343205, 1432752, 1790940, 2149128, 2387920, 2686410, 3581880, 4298256, 5372820, 7163760, 10745640, 21491280]

約数ペア:

[(1, 21491280), (2, 10745640), (3, 7163760), (4, 5372820), (5, 4298256), (6, 3581880), (8, 2686410), (9, 2387920), (10, 2149128), (12, 1790940), (15, 1432752), (16, 1343205), (18, 1193960), (19, 1131120), (20, 1074564), (24, 895470), (30, 716376), (36, 596980), (38, 565560), (40, 537282), (45, 477584), (48, 447735), (57, 377040), (60, 358188), (72, 298490), (76, 282780), (80, 268641), (90, 238792), (95, 226224), (114, 188520), (120, 179094), (144, 149245), (152, 141390), (171, 125680), (180, 119396), (190, 113112), (228, 94260), (240, 89547), (285, 75408), (304, 70695), (342, 62840), (360, 59698), (380, 56556), (456, 47130), (570, 37704), (684, 31420), (720, 29849), (760, 28278), (855, 25136), (912, 23565), (1140, 18852), (1368, 15710), (1520, 14139), (1571, 13680), (1710, 12568), (2280, 9426), (2736, 7855), (3142, 6840), (3420, 6284), (4560, 4713)]