18721144

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 38803320

約数和(自身を除く): 20082176

約数列:

[1, 2, 4, 8, 13, 26, 52, 61, 104, 122, 169, 227, 244, 338, 454, 488, 676, 793, 908, 1352, 1586, 1816, 2951, 3172, 5902, 6344, 10309, 11804, 13847, 20618, 23608, 27694, 38363, 41236, 55388, 76726, 82472, 110776, 153452, 180011, 306904, 360022, 720044, 1440088, 2340143, 4680286, 9360572, 18721144]

約数ペア:

[(1, 18721144), (2, 9360572), (4, 4680286), (8, 2340143), (13, 1440088), (26, 720044), (52, 360022), (61, 306904), (104, 180011), (122, 153452), (169, 110776), (227, 82472), (244, 76726), (338, 55388), (454, 41236), (488, 38363), (676, 27694), (793, 23608), (908, 20618), (1352, 13847), (1586, 11804), (1816, 10309), (2951, 6344), (3172, 5902)]