30988660

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 66890880

約数和(自身を除く): 35902220

約数列:

[1, 2, 4, 5, 10, 20, 71, 139, 142, 157, 278, 284, 314, 355, 556, 628, 695, 710, 785, 1390, 1420, 1570, 2780, 3140, 9869, 11147, 19738, 21823, 22294, 39476, 43646, 44588, 49345, 55735, 87292, 98690, 109115, 111470, 197380, 218230, 222940, 436460, 1549433, 3098866, 6197732, 7747165, 15494330, 30988660]

約数ペア:

[(1, 30988660), (2, 15494330), (4, 7747165), (5, 6197732), (10, 3098866), (20, 1549433), (71, 436460), (139, 222940), (142, 218230), (157, 197380), (278, 111470), (284, 109115), (314, 98690), (355, 87292), (556, 55735), (628, 49345), (695, 44588), (710, 43646), (785, 39476), (1390, 22294), (1420, 21823), (1570, 19738), (2780, 11147), (3140, 9869)]