2219980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 5414976

約数和(自身を除く): 3194996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 157, 202, 314, 404, 505, 628, 707, 785, 1010, 1099, 1414, 1570, 2020, 2198, 2828, 3140, 3535, 4396, 5495, 7070, 10990, 14140, 15857, 21980, 31714, 63428, 79285, 110999, 158570, 221998, 317140, 443996, 554995, 1109990, 2219980]

約数ペア:

[(1, 2219980), (2, 1109990), (4, 554995), (5, 443996), (7, 317140), (10, 221998), (14, 158570), (20, 110999), (28, 79285), (35, 63428), (70, 31714), (101, 21980), (140, 15857), (157, 14140), (202, 10990), (314, 7070), (404, 5495), (505, 4396), (628, 3535), (707, 3140), (785, 2828), (1010, 2198), (1099, 2020), (1414, 1570)]