81719825660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{475613}}^1$

素因数の和:475715

約数の個数: 72

約数和(自身を含む): 191288145888

約数和(自身を除く): 109568320228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 121, 142, 220, 242, 284, 355, 484, 605, 710, 781, 1210, 1420, 1562, 2420, 3124, 3905, 7810, 8591, 15620, 17182, 34364, 42955, 85910, 171820, 475613, 951226, 1902452, 2378065, 4756130, 5231743, 9512260, 10463486, 20926972, 26158715, 33768523, 52317430, 57549173, 67537046, 104634860, 115098346, 135074092, 168842615, 230196692, 287745865, 337685230, 371453753, 575491730, 675370460, 742907506, 1150983460, 1485815012, 1857268765, 3714537530, 4085991283, 7429075060, 8171982566, 16343965132, 20429956415, 40859912830, 81719825660]

約数ペア:

[(1, 81719825660), (2, 40859912830), (4, 20429956415), (5, 16343965132), (10, 8171982566), (11, 7429075060), (20, 4085991283), (22, 3714537530), (44, 1857268765), (55, 1485815012), (71, 1150983460), (110, 742907506), (121, 675370460), (142, 575491730), (220, 371453753), (242, 337685230), (284, 287745865), (355, 230196692), (484, 168842615), (605, 135074092), (710, 115098346), (781, 104634860), (1210, 67537046), (1420, 57549173), (1562, 52317430), (2420, 33768523), (3124, 26158715), (3905, 20926972), (7810, 10463486), (8591, 9512260), (15620, 5231743), (17182, 4756130), (34364, 2378065), (42955, 1902452), (85910, 951226), (171820, 475613)]