19596020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 42411600

約数和(自身を除く): 22815580

約数列:

[1, 2, 4, 5, 10, 20, 89, 101, 109, 178, 202, 218, 356, 404, 436, 445, 505, 545, 890, 1010, 1090, 1780, 2020, 2180, 8989, 9701, 11009, 17978, 19402, 22018, 35956, 38804, 44036, 44945, 48505, 55045, 89890, 97010, 110090, 179780, 194020, 220180, 979801, 1959602, 3919204, 4899005, 9798010, 19596020]

約数ペア:

[(1, 19596020), (2, 9798010), (4, 4899005), (5, 3919204), (10, 1959602), (20, 979801), (89, 220180), (101, 194020), (109, 179780), (178, 110090), (202, 97010), (218, 89890), (356, 55045), (404, 48505), (436, 44945), (445, 44036), (505, 38804), (545, 35956), (890, 22018), (1010, 19402), (1090, 17978), (1780, 11009), (2020, 9701), (2180, 8989)]