21385910

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:429

約数の個数: 64

約数和(自身を含む): 48190464

約数和(自身を除く): 26804554

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 71, 91, 130, 142, 182, 331, 355, 455, 497, 662, 710, 910, 923, 994, 1655, 1846, 2317, 2485, 3310, 4303, 4615, 4634, 4970, 6461, 8606, 9230, 11585, 12922, 21515, 23170, 23501, 30121, 32305, 43030, 47002, 60242, 64610, 117505, 150605, 164507, 235010, 301210, 305513, 329014, 611026, 822535, 1527565, 1645070, 2138591, 3055130, 4277182, 10692955, 21385910]

約数ペア:

[(1, 21385910), (2, 10692955), (5, 4277182), (7, 3055130), (10, 2138591), (13, 1645070), (14, 1527565), (26, 822535), (35, 611026), (65, 329014), (70, 305513), (71, 301210), (91, 235010), (130, 164507), (142, 150605), (182, 117505), (331, 64610), (355, 60242), (455, 47002), (497, 43030), (662, 32305), (710, 30121), (910, 23501), (923, 23170), (994, 21515), (1655, 12922), (1846, 11585), (2317, 9230), (2485, 8606), (3310, 6461), (4303, 4970), (4615, 4634)]