19907840

素因数分解:

$2^8\times 5^1\times {\mathrm{103}}^1\times {\mathrm{151}}^1$

素因数の和:275

約数の個数: 72

約数和(自身を含む): 48467328

約数和(自身を除く): 28559488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 128, 151, 160, 206, 256, 302, 320, 412, 515, 604, 640, 755, 824, 1030, 1208, 1280, 1510, 1648, 2060, 2416, 3020, 3296, 4120, 4832, 6040, 6592, 8240, 9664, 12080, 13184, 15553, 16480, 19328, 24160, 26368, 31106, 32960, 38656, 48320, 62212, 65920, 77765, 96640, 124424, 131840, 155530, 193280, 248848, 311060, 497696, 622120, 995392, 1244240, 1990784, 2488480, 3981568, 4976960, 9953920, 19907840]

約数ペア:

[(1, 19907840), (2, 9953920), (4, 4976960), (5, 3981568), (8, 2488480), (10, 1990784), (16, 1244240), (20, 995392), (32, 622120), (40, 497696), (64, 311060), (80, 248848), (103, 193280), (128, 155530), (151, 131840), (160, 124424), (206, 96640), (256, 77765), (302, 65920), (320, 62212), (412, 48320), (515, 38656), (604, 32960), (640, 31106), (755, 26368), (824, 24160), (1030, 19328), (1208, 16480), (1280, 15553), (1510, 13184), (1648, 12080), (2060, 9664), (2416, 8240), (3020, 6592), (3296, 6040), (4120, 4832)]