81976140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{19801}}^1$

素因数の和:19839

約数の個数: 72

約数和(自身を含む): 259485408

約数和(自身を除く): 177509268

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 90, 92, 115, 138, 180, 207, 230, 276, 345, 414, 460, 690, 828, 1035, 1380, 2070, 4140, 19801, 39602, 59403, 79204, 99005, 118806, 178209, 198010, 237612, 297015, 356418, 396020, 455423, 594030, 712836, 891045, 910846, 1188060, 1366269, 1782090, 1821692, 2277115, 2732538, 3564180, 4098807, 4554230, 5465076, 6831345, 8197614, 9108460, 13662690, 16395228, 20494035, 27325380, 40988070, 81976140]

約数ペア:

[(1, 81976140), (2, 40988070), (3, 27325380), (4, 20494035), (5, 16395228), (6, 13662690), (9, 9108460), (10, 8197614), (12, 6831345), (15, 5465076), (18, 4554230), (20, 4098807), (23, 3564180), (30, 2732538), (36, 2277115), (45, 1821692), (46, 1782090), (60, 1366269), (69, 1188060), (90, 910846), (92, 891045), (115, 712836), (138, 594030), (180, 455423), (207, 396020), (230, 356418), (276, 297015), (345, 237612), (414, 198010), (460, 178209), (690, 118806), (828, 99005), (1035, 79204), (1380, 59403), (2070, 39602), (4140, 19801)]