21345840

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1289}}^1$

素因数の和:1331

約数の個数: 120

約数和(自身を含む): 74861280

約数和(自身を除く): 53515440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 36, 40, 45, 46, 48, 60, 69, 72, 80, 90, 92, 115, 120, 138, 144, 180, 184, 207, 230, 240, 276, 345, 360, 368, 414, 460, 552, 690, 720, 828, 920, 1035, 1104, 1289, 1380, 1656, 1840, 2070, 2578, 2760, 3312, 3867, 4140, 5156, 5520, 6445, 7734, 8280, 10312, 11601, 12890, 15468, 16560, 19335, 20624, 23202, 25780, 29647, 30936, 38670, 46404, 51560, 58005, 59294, 61872, 77340, 88941, 92808, 103120, 116010, 118588, 148235, 154680, 177882, 185616, 232020, 237176, 266823, 296470, 309360, 355764, 444705, 464040, 474352, 533646, 592940, 711528, 889410, 928080, 1067292, 1185880, 1334115, 1423056, 1778820, 2134584, 2371760, 2668230, 3557640, 4269168, 5336460, 7115280, 10672920, 21345840]

約数ペア:

[(1, 21345840), (2, 10672920), (3, 7115280), (4, 5336460), (5, 4269168), (6, 3557640), (8, 2668230), (9, 2371760), (10, 2134584), (12, 1778820), (15, 1423056), (16, 1334115), (18, 1185880), (20, 1067292), (23, 928080), (24, 889410), (30, 711528), (36, 592940), (40, 533646), (45, 474352), (46, 464040), (48, 444705), (60, 355764), (69, 309360), (72, 296470), (80, 266823), (90, 237176), (92, 232020), (115, 185616), (120, 177882), (138, 154680), (144, 148235), (180, 118588), (184, 116010), (207, 103120), (230, 92808), (240, 88941), (276, 77340), (345, 61872), (360, 59294), (368, 58005), (414, 51560), (460, 46404), (552, 38670), (690, 30936), (720, 29647), (828, 25780), (920, 23202), (1035, 20624), (1104, 19335), (1289, 16560), (1380, 15468), (1656, 12890), (1840, 11601), (2070, 10312), (2578, 8280), (2760, 7734), (3312, 6445), (3867, 5520), (4140, 5156)]