217980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{173}}^1$

素因数の和:195

約数の個数: 72

約数和(自身を含む): 760032

約数和(自身を除く): 542052

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 173, 180, 210, 252, 315, 346, 420, 519, 630, 692, 865, 1038, 1211, 1260, 1557, 1730, 2076, 2422, 2595, 3114, 3460, 3633, 4844, 5190, 6055, 6228, 7266, 7785, 10380, 10899, 12110, 14532, 15570, 18165, 21798, 24220, 31140, 36330, 43596, 54495, 72660, 108990, 217980]

約数ペア:

[(1, 217980), (2, 108990), (3, 72660), (4, 54495), (5, 43596), (6, 36330), (7, 31140), (9, 24220), (10, 21798), (12, 18165), (14, 15570), (15, 14532), (18, 12110), (20, 10899), (21, 10380), (28, 7785), (30, 7266), (35, 6228), (36, 6055), (42, 5190), (45, 4844), (60, 3633), (63, 3460), (70, 3114), (84, 2595), (90, 2422), (105, 2076), (126, 1730), (140, 1557), (173, 1260), (180, 1211), (210, 1038), (252, 865), (315, 692), (346, 630), (420, 519)]