19747780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{503}}^1$

素因数の和:676

約数の個数: 48

約数和(自身を含む): 45045504

約数和(自身を除く): 25297724

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 151, 260, 302, 503, 604, 755, 1006, 1510, 1963, 2012, 2515, 3020, 3926, 5030, 6539, 7852, 9815, 10060, 13078, 19630, 26156, 32695, 39260, 65390, 75953, 130780, 151906, 303812, 379765, 759530, 987389, 1519060, 1974778, 3949556, 4936945, 9873890, 19747780]

約数ペア:

[(1, 19747780), (2, 9873890), (4, 4936945), (5, 3949556), (10, 1974778), (13, 1519060), (20, 987389), (26, 759530), (52, 379765), (65, 303812), (130, 151906), (151, 130780), (260, 75953), (302, 65390), (503, 39260), (604, 32695), (755, 26156), (1006, 19630), (1510, 13078), (1963, 10060), (2012, 9815), (2515, 7852), (3020, 6539), (3926, 5030)]