21340160

素因数分解:

$2^{13}\times 5^1\times {\mathrm{521}}^1$

素因数の和:552

約数の個数: 56

約数和(自身を含む): 51311556

約数和(自身を除く): 29971396

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 521, 640, 1024, 1042, 1280, 2048, 2084, 2560, 2605, 4096, 4168, 5120, 5210, 8192, 8336, 10240, 10420, 16672, 20480, 20840, 33344, 40960, 41680, 66688, 83360, 133376, 166720, 266752, 333440, 533504, 666880, 1067008, 1333760, 2134016, 2667520, 4268032, 5335040, 10670080, 21340160]

約数ペア:

[(1, 21340160), (2, 10670080), (4, 5335040), (5, 4268032), (8, 2667520), (10, 2134016), (16, 1333760), (20, 1067008), (32, 666880), (40, 533504), (64, 333440), (80, 266752), (128, 166720), (160, 133376), (256, 83360), (320, 66688), (512, 41680), (521, 40960), (640, 33344), (1024, 20840), (1042, 20480), (1280, 16672), (2048, 10420), (2084, 10240), (2560, 8336), (2605, 8192), (4096, 5210), (4168, 5120)]