61977320

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 143337600

約数和(自身を除く): 81360280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 139, 142, 157, 278, 284, 314, 355, 556, 568, 628, 695, 710, 785, 1112, 1256, 1390, 1420, 1570, 2780, 2840, 3140, 5560, 6280, 9869, 11147, 19738, 21823, 22294, 39476, 43646, 44588, 49345, 55735, 78952, 87292, 89176, 98690, 109115, 111470, 174584, 197380, 218230, 222940, 394760, 436460, 445880, 872920, 1549433, 3098866, 6197732, 7747165, 12395464, 15494330, 30988660, 61977320]

約数ペア:

[(1, 61977320), (2, 30988660), (4, 15494330), (5, 12395464), (8, 7747165), (10, 6197732), (20, 3098866), (40, 1549433), (71, 872920), (139, 445880), (142, 436460), (157, 394760), (278, 222940), (284, 218230), (314, 197380), (355, 174584), (556, 111470), (568, 109115), (628, 98690), (695, 89176), (710, 87292), (785, 78952), (1112, 55735), (1256, 49345), (1390, 44588), (1420, 43646), (1570, 39476), (2780, 22294), (2840, 21823), (3140, 19738), (5560, 11147), (6280, 9869)]