2178118900

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{709}}^1\times {\mathrm{991}}^1$

素因数の和:1745

約数の個数: 72

約数和(自身を含む): 4890798080

約数和(自身を除く): 2712679180

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 155, 310, 620, 709, 775, 991, 1418, 1550, 1982, 2836, 3100, 3545, 3964, 4955, 7090, 9910, 14180, 17725, 19820, 21979, 24775, 30721, 35450, 43958, 49550, 61442, 70900, 87916, 99100, 109895, 122884, 153605, 219790, 307210, 439580, 549475, 614420, 702619, 768025, 1098950, 1405238, 1536050, 2197900, 2810476, 3072100, 3513095, 7026190, 14052380, 17565475, 21781189, 35130950, 43562378, 70261900, 87124756, 108905945, 217811890, 435623780, 544529725, 1089059450, 2178118900]

約数ペア:

[(1, 2178118900), (2, 1089059450), (4, 544529725), (5, 435623780), (10, 217811890), (20, 108905945), (25, 87124756), (31, 70261900), (50, 43562378), (62, 35130950), (100, 21781189), (124, 17565475), (155, 14052380), (310, 7026190), (620, 3513095), (709, 3072100), (775, 2810476), (991, 2197900), (1418, 1536050), (1550, 1405238), (1982, 1098950), (2836, 768025), (3100, 702619), (3545, 614420), (3964, 549475), (4955, 439580), (7090, 307210), (9910, 219790), (14180, 153605), (17725, 122884), (19820, 109895), (21979, 99100), (24775, 87916), (30721, 70900), (35450, 61442), (43958, 49550)]