640980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{1187}}^1$

素因数の和:1205

約数の個数: 48

約数和(自身を含む): 1995840

約数和(自身を除く): 1354860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 270, 540, 1187, 2374, 3561, 4748, 5935, 7122, 10683, 11870, 14244, 17805, 21366, 23740, 32049, 35610, 42732, 53415, 64098, 71220, 106830, 128196, 160245, 213660, 320490, 640980]

約数ペア:

[(1, 640980), (2, 320490), (3, 213660), (4, 160245), (5, 128196), (6, 106830), (9, 71220), (10, 64098), (12, 53415), (15, 42732), (18, 35610), (20, 32049), (27, 23740), (30, 21366), (36, 17805), (45, 14244), (54, 11870), (60, 10683), (90, 7122), (108, 5935), (135, 4748), (180, 3561), (270, 2374), (540, 1187)]