20821088

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:331

約数の個数: 48

約数和(自身を含む): 42900480

約数和(自身を除く): 22079392

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 124, 139, 151, 248, 278, 302, 496, 556, 604, 992, 1112, 1208, 2224, 2416, 4309, 4448, 4681, 4832, 8618, 9362, 17236, 18724, 20989, 34472, 37448, 41978, 68944, 74896, 83956, 137888, 149792, 167912, 335824, 650659, 671648, 1301318, 2602636, 5205272, 10410544, 20821088]

約数ペア:

[(1, 20821088), (2, 10410544), (4, 5205272), (8, 2602636), (16, 1301318), (31, 671648), (32, 650659), (62, 335824), (124, 167912), (139, 149792), (151, 137888), (248, 83956), (278, 74896), (302, 68944), (496, 41978), (556, 37448), (604, 34472), (992, 20989), (1112, 18724), (1208, 17236), (2224, 9362), (2416, 8618), (4309, 4832), (4448, 4681)]