77802020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{401}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 167151600

約数和(自身を除く): 89349580

約数列:

[1, 2, 4, 5, 10, 20, 89, 109, 178, 218, 356, 401, 436, 445, 545, 802, 890, 1090, 1604, 1780, 2005, 2180, 4010, 8020, 9701, 19402, 35689, 38804, 43709, 48505, 71378, 87418, 97010, 142756, 174836, 178445, 194020, 218545, 356890, 437090, 713780, 874180, 3890101, 7780202, 15560404, 19450505, 38901010, 77802020]

約数ペア:

[(1, 77802020), (2, 38901010), (4, 19450505), (5, 15560404), (10, 7780202), (20, 3890101), (89, 874180), (109, 713780), (178, 437090), (218, 356890), (356, 218545), (401, 194020), (436, 178445), (445, 174836), (545, 142756), (802, 97010), (890, 87418), (1090, 71378), (1604, 48505), (1780, 43709), (2005, 38804), (2180, 35689), (4010, 19402), (8020, 9701)]