21415280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{193}}^1$

素因数の和:298

約数の個数: 80

約数和(自身を含む): 53404320

約数和(自身を除く): 31989040

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 73, 76, 80, 95, 146, 152, 190, 193, 292, 304, 365, 380, 386, 584, 730, 760, 772, 965, 1168, 1387, 1460, 1520, 1544, 1930, 2774, 2920, 3088, 3667, 3860, 5548, 5840, 6935, 7334, 7720, 11096, 13870, 14089, 14668, 15440, 18335, 22192, 27740, 28178, 29336, 36670, 55480, 56356, 58672, 70445, 73340, 110960, 112712, 140890, 146680, 225424, 267691, 281780, 293360, 535382, 563560, 1070764, 1127120, 1338455, 2141528, 2676910, 4283056, 5353820, 10707640, 21415280]

約数ペア:

[(1, 21415280), (2, 10707640), (4, 5353820), (5, 4283056), (8, 2676910), (10, 2141528), (16, 1338455), (19, 1127120), (20, 1070764), (38, 563560), (40, 535382), (73, 293360), (76, 281780), (80, 267691), (95, 225424), (146, 146680), (152, 140890), (190, 112712), (193, 110960), (292, 73340), (304, 70445), (365, 58672), (380, 56356), (386, 55480), (584, 36670), (730, 29336), (760, 28178), (772, 27740), (965, 22192), (1168, 18335), (1387, 15440), (1460, 14668), (1520, 14089), (1544, 13870), (1930, 11096), (2774, 7720), (2920, 7334), (3088, 6935), (3667, 5840), (3860, 5548)]