21290880

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{853}}^1$

素因数の和:888

約数の個数: 128

約数和(自身を含む): 73170720

約数和(自身を除く): 51879840

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 128, 130, 156, 160, 192, 195, 208, 240, 260, 312, 320, 384, 390, 416, 480, 520, 624, 640, 780, 832, 853, 960, 1040, 1248, 1560, 1664, 1706, 1920, 2080, 2496, 2559, 3120, 3412, 4160, 4265, 4992, 5118, 6240, 6824, 8320, 8530, 10236, 11089, 12480, 12795, 13648, 17060, 20472, 22178, 24960, 25590, 27296, 33267, 34120, 40944, 44356, 51180, 54592, 55445, 66534, 68240, 81888, 88712, 102360, 109184, 110890, 133068, 136480, 163776, 166335, 177424, 204720, 221780, 266136, 272960, 327552, 332670, 354848, 409440, 443560, 532272, 545920, 665340, 709696, 818880, 887120, 1064544, 1330680, 1419392, 1637760, 1774240, 2129088, 2661360, 3548480, 4258176, 5322720, 7096960, 10645440, 21290880]

約数ペア:

[(1, 21290880), (2, 10645440), (3, 7096960), (4, 5322720), (5, 4258176), (6, 3548480), (8, 2661360), (10, 2129088), (12, 1774240), (13, 1637760), (15, 1419392), (16, 1330680), (20, 1064544), (24, 887120), (26, 818880), (30, 709696), (32, 665340), (39, 545920), (40, 532272), (48, 443560), (52, 409440), (60, 354848), (64, 332670), (65, 327552), (78, 272960), (80, 266136), (96, 221780), (104, 204720), (120, 177424), (128, 166335), (130, 163776), (156, 136480), (160, 133068), (192, 110890), (195, 109184), (208, 102360), (240, 88712), (260, 81888), (312, 68240), (320, 66534), (384, 55445), (390, 54592), (416, 51180), (480, 44356), (520, 40944), (624, 34120), (640, 33267), (780, 27296), (832, 25590), (853, 24960), (960, 22178), (1040, 20472), (1248, 17060), (1560, 13648), (1664, 12795), (1706, 12480), (1920, 11089), (2080, 10236), (2496, 8530), (2559, 8320), (3120, 6824), (3412, 6240), (4160, 5118), (4265, 4992)]