21617440

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{547}}^1$

素因数の和:594

約数の個数: 96

約数和(自身を含む): 58000320

約数和(自身を除く): 36382880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 380, 416, 494, 520, 547, 608, 760, 988, 1040, 1094, 1235, 1520, 1976, 2080, 2188, 2470, 2735, 3040, 3952, 4376, 4940, 5470, 7111, 7904, 8752, 9880, 10393, 10940, 14222, 17504, 19760, 20786, 21880, 28444, 35555, 39520, 41572, 43760, 51965, 56888, 71110, 83144, 87520, 103930, 113776, 135109, 142220, 166288, 207860, 227552, 270218, 284440, 332576, 415720, 540436, 568880, 675545, 831440, 1080872, 1137760, 1351090, 1662880, 2161744, 2702180, 4323488, 5404360, 10808720, 21617440]

約数ペア:

[(1, 21617440), (2, 10808720), (4, 5404360), (5, 4323488), (8, 2702180), (10, 2161744), (13, 1662880), (16, 1351090), (19, 1137760), (20, 1080872), (26, 831440), (32, 675545), (38, 568880), (40, 540436), (52, 415720), (65, 332576), (76, 284440), (80, 270218), (95, 227552), (104, 207860), (130, 166288), (152, 142220), (160, 135109), (190, 113776), (208, 103930), (247, 87520), (260, 83144), (304, 71110), (380, 56888), (416, 51965), (494, 43760), (520, 41572), (547, 39520), (608, 35555), (760, 28444), (988, 21880), (1040, 20786), (1094, 19760), (1235, 17504), (1520, 14222), (1976, 10940), (2080, 10393), (2188, 9880), (2470, 8752), (2735, 7904), (3040, 7111), (3952, 5470), (4376, 4940)]