640533640

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{432793}}^1$

素因数の和:432841

約数の個数: 32

約数和(自身を含む): 1480155480

約数和(自身を除く): 839621840

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 432793, 865586, 1731172, 2163965, 3462344, 4327930, 8655860, 16013341, 17311720, 32026682, 64053364, 80066705, 128106728, 160133410, 320266820, 640533640]

約数ペア:

[(1, 640533640), (2, 320266820), (4, 160133410), (5, 128106728), (8, 80066705), (10, 64053364), (20, 32026682), (37, 17311720), (40, 16013341), (74, 8655860), (148, 4327930), (185, 3462344), (296, 2163965), (370, 1731172), (740, 865586), (1480, 432793)]