802780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 1905120

約数和(自身を除く): 1102340

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 89, 110, 164, 178, 205, 220, 356, 410, 445, 451, 820, 890, 902, 979, 1780, 1804, 1958, 2255, 3649, 3916, 4510, 4895, 7298, 9020, 9790, 14596, 18245, 19580, 36490, 40139, 72980, 80278, 160556, 200695, 401390, 802780]

約数ペア:

[(1, 802780), (2, 401390), (4, 200695), (5, 160556), (10, 80278), (11, 72980), (20, 40139), (22, 36490), (41, 19580), (44, 18245), (55, 14596), (82, 9790), (89, 9020), (110, 7298), (164, 4895), (178, 4510), (205, 3916), (220, 3649), (356, 2255), (410, 1958), (445, 1804), (451, 1780), (820, 979), (890, 902)]