21428480

素因数分解:

$2^8\times 5^1\times {\mathrm{16741}}^1$

素因数の和:16762

約数の個数: 36

約数和(自身を含む): 51330972

約数和(自身を除く): 29902492

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16741, 33482, 66964, 83705, 133928, 167410, 267856, 334820, 535712, 669640, 1071424, 1339280, 2142848, 2678560, 4285696, 5357120, 10714240, 21428480]

約数ペア:

[(1, 21428480), (2, 10714240), (4, 5357120), (5, 4285696), (8, 2678560), (10, 2142848), (16, 1339280), (20, 1071424), (32, 669640), (40, 535712), (64, 334820), (80, 267856), (128, 167410), (160, 133928), (256, 83705), (320, 66964), (640, 33482), (1280, 16741)]