21047950

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{11}}^2\times {\mathrm{71}}^1$

素因数の和:119

約数の個数: 108

約数和(自身を含む): 50762376

約数和(自身を除く): 29714426

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 25, 35, 49, 50, 55, 70, 71, 77, 98, 110, 121, 142, 154, 175, 242, 245, 275, 350, 355, 385, 490, 497, 539, 550, 605, 710, 770, 781, 847, 994, 1078, 1210, 1225, 1562, 1694, 1775, 1925, 2450, 2485, 2695, 3025, 3479, 3550, 3850, 3905, 4235, 4970, 5390, 5467, 5929, 6050, 6958, 7810, 8470, 8591, 10934, 11858, 12425, 13475, 17182, 17395, 19525, 21175, 24850, 26950, 27335, 29645, 34790, 38269, 39050, 42350, 42955, 54670, 59290, 60137, 76538, 85910, 86975, 120274, 136675, 148225, 173950, 191345, 214775, 273350, 296450, 300685, 382690, 420959, 429550, 601370, 841918, 956725, 1503425, 1913450, 2104795, 3006850, 4209590, 10523975, 21047950]

約数ペア:

[(1, 21047950), (2, 10523975), (5, 4209590), (7, 3006850), (10, 2104795), (11, 1913450), (14, 1503425), (22, 956725), (25, 841918), (35, 601370), (49, 429550), (50, 420959), (55, 382690), (70, 300685), (71, 296450), (77, 273350), (98, 214775), (110, 191345), (121, 173950), (142, 148225), (154, 136675), (175, 120274), (242, 86975), (245, 85910), (275, 76538), (350, 60137), (355, 59290), (385, 54670), (490, 42955), (497, 42350), (539, 39050), (550, 38269), (605, 34790), (710, 29645), (770, 27335), (781, 26950), (847, 24850), (994, 21175), (1078, 19525), (1210, 17395), (1225, 17182), (1562, 13475), (1694, 12425), (1775, 11858), (1925, 10934), (2450, 8591), (2485, 8470), (2695, 7810), (3025, 6958), (3479, 6050), (3550, 5929), (3850, 5467), (3905, 5390), (4235, 4970)]