21173620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:161

約数の個数: 96

約数和(自身を含む): 51480576

約数和(自身を除く): 30306956

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 37, 52, 62, 65, 71, 74, 124, 130, 142, 148, 155, 185, 260, 284, 310, 355, 370, 403, 481, 620, 710, 740, 806, 923, 962, 1147, 1420, 1612, 1846, 1924, 2015, 2201, 2294, 2405, 2627, 3692, 4030, 4402, 4588, 4615, 4810, 5254, 5735, 8060, 8804, 9230, 9620, 10508, 11005, 11470, 13135, 14911, 18460, 22010, 22940, 26270, 28613, 29822, 34151, 44020, 52540, 57226, 59644, 68302, 74555, 81437, 114452, 136604, 143065, 149110, 162874, 170755, 286130, 298220, 325748, 341510, 407185, 572260, 683020, 814370, 1058681, 1628740, 2117362, 4234724, 5293405, 10586810, 21173620]

約数ペア:

[(1, 21173620), (2, 10586810), (4, 5293405), (5, 4234724), (10, 2117362), (13, 1628740), (20, 1058681), (26, 814370), (31, 683020), (37, 572260), (52, 407185), (62, 341510), (65, 325748), (71, 298220), (74, 286130), (124, 170755), (130, 162874), (142, 149110), (148, 143065), (155, 136604), (185, 114452), (260, 81437), (284, 74555), (310, 68302), (355, 59644), (370, 57226), (403, 52540), (481, 44020), (620, 34151), (710, 29822), (740, 28613), (806, 26270), (923, 22940), (962, 22010), (1147, 18460), (1420, 14911), (1612, 13135), (1846, 11470), (1924, 11005), (2015, 10508), (2201, 9620), (2294, 9230), (2405, 8804), (2627, 8060), (3692, 5735), (4030, 5254), (4402, 4810), (4588, 4615)]