4451780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:200

約数の個数: 48

約数和(自身を含む): 9843120

約数和(自身を除く): 5391340

約数列:

[1, 2, 4, 5, 10, 20, 41, 61, 82, 89, 122, 164, 178, 205, 244, 305, 356, 410, 445, 610, 820, 890, 1220, 1780, 2501, 3649, 5002, 5429, 7298, 10004, 10858, 12505, 14596, 18245, 21716, 25010, 27145, 36490, 50020, 54290, 72980, 108580, 222589, 445178, 890356, 1112945, 2225890, 4451780]

約数ペア:

[(1, 4451780), (2, 2225890), (4, 1112945), (5, 890356), (10, 445178), (20, 222589), (41, 108580), (61, 72980), (82, 54290), (89, 50020), (122, 36490), (164, 27145), (178, 25010), (205, 21716), (244, 18245), (305, 14596), (356, 12505), (410, 10858), (445, 10004), (610, 7298), (820, 5429), (890, 5002), (1220, 3649), (1780, 2501)]