21335680

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:126

約数の個数: 128

約数和(自身を含む): 56512080

約数和(自身を除く): 35176400

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 37, 40, 53, 64, 68, 74, 80, 85, 106, 128, 136, 148, 160, 170, 185, 212, 265, 272, 296, 320, 340, 370, 424, 530, 544, 592, 629, 640, 680, 740, 848, 901, 1060, 1088, 1184, 1258, 1360, 1480, 1696, 1802, 1961, 2120, 2176, 2368, 2516, 2720, 2960, 3145, 3392, 3604, 3922, 4240, 4505, 4736, 5032, 5440, 5920, 6290, 6784, 7208, 7844, 8480, 9010, 9805, 10064, 10880, 11840, 12580, 14416, 15688, 16960, 18020, 19610, 20128, 23680, 25160, 28832, 31376, 33337, 33920, 36040, 39220, 40256, 50320, 57664, 62752, 66674, 72080, 78440, 80512, 100640, 115328, 125504, 133348, 144160, 156880, 166685, 201280, 251008, 266696, 288320, 313760, 333370, 402560, 533392, 576640, 627520, 666740, 1066784, 1255040, 1333480, 2133568, 2666960, 4267136, 5333920, 10667840, 21335680]

約数ペア:

[(1, 21335680), (2, 10667840), (4, 5333920), (5, 4267136), (8, 2666960), (10, 2133568), (16, 1333480), (17, 1255040), (20, 1066784), (32, 666740), (34, 627520), (37, 576640), (40, 533392), (53, 402560), (64, 333370), (68, 313760), (74, 288320), (80, 266696), (85, 251008), (106, 201280), (128, 166685), (136, 156880), (148, 144160), (160, 133348), (170, 125504), (185, 115328), (212, 100640), (265, 80512), (272, 78440), (296, 72080), (320, 66674), (340, 62752), (370, 57664), (424, 50320), (530, 40256), (544, 39220), (592, 36040), (629, 33920), (640, 33337), (680, 31376), (740, 28832), (848, 25160), (901, 23680), (1060, 20128), (1088, 19610), (1184, 18020), (1258, 16960), (1360, 15688), (1480, 14416), (1696, 12580), (1802, 11840), (1961, 10880), (2120, 10064), (2176, 9805), (2368, 9010), (2516, 8480), (2720, 7844), (2960, 7208), (3145, 6784), (3392, 6290), (3604, 5920), (3922, 5440), (4240, 5032), (4505, 4736)]