21368320

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:531

約数の個数: 80

約数和(自身を含む): 54358128

約数和(自身を除く): 32989808

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 491, 512, 544, 640, 680, 982, 1088, 1280, 1360, 1964, 2176, 2455, 2560, 2720, 3928, 4352, 4910, 5440, 7856, 8347, 8704, 9820, 10880, 15712, 16694, 19640, 21760, 31424, 33388, 39280, 41735, 43520, 62848, 66776, 78560, 83470, 125696, 133552, 157120, 166940, 251392, 267104, 314240, 333880, 534208, 628480, 667760, 1068416, 1256960, 1335520, 2136832, 2671040, 4273664, 5342080, 10684160, 21368320]

約数ペア:

[(1, 21368320), (2, 10684160), (4, 5342080), (5, 4273664), (8, 2671040), (10, 2136832), (16, 1335520), (17, 1256960), (20, 1068416), (32, 667760), (34, 628480), (40, 534208), (64, 333880), (68, 314240), (80, 267104), (85, 251392), (128, 166940), (136, 157120), (160, 133552), (170, 125696), (256, 83470), (272, 78560), (320, 66776), (340, 62848), (491, 43520), (512, 41735), (544, 39280), (640, 33388), (680, 31424), (982, 21760), (1088, 19640), (1280, 16694), (1360, 15712), (1964, 10880), (2176, 9820), (2455, 8704), (2560, 8347), (2720, 7856), (3928, 5440), (4352, 4910)]