19739440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{349}}^1$

素因数の和:470

約数の個数: 80

約数和(自身を含む): 53121600

約数和(自身を除く): 33382160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 101, 112, 140, 202, 280, 349, 404, 505, 560, 698, 707, 808, 1010, 1396, 1414, 1616, 1745, 2020, 2443, 2792, 2828, 3490, 3535, 4040, 4886, 5584, 5656, 6980, 7070, 8080, 9772, 11312, 12215, 13960, 14140, 19544, 24430, 27920, 28280, 35249, 39088, 48860, 56560, 70498, 97720, 140996, 176245, 195440, 246743, 281992, 352490, 493486, 563984, 704980, 986972, 1233715, 1409960, 1973944, 2467430, 2819920, 3947888, 4934860, 9869720, 19739440]

約数ペア:

[(1, 19739440), (2, 9869720), (4, 4934860), (5, 3947888), (7, 2819920), (8, 2467430), (10, 1973944), (14, 1409960), (16, 1233715), (20, 986972), (28, 704980), (35, 563984), (40, 493486), (56, 352490), (70, 281992), (80, 246743), (101, 195440), (112, 176245), (140, 140996), (202, 97720), (280, 70498), (349, 56560), (404, 48860), (505, 39088), (560, 35249), (698, 28280), (707, 27920), (808, 24430), (1010, 19544), (1396, 14140), (1414, 13960), (1616, 12215), (1745, 11312), (2020, 9772), (2443, 8080), (2792, 7070), (2828, 6980), (3490, 5656), (3535, 5584), (4040, 4886)]