20645324

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{257}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 43921920

約数和(自身を除く): 23276596

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 151, 257, 266, 302, 514, 532, 604, 1028, 1057, 1799, 2114, 2869, 3598, 4228, 4883, 5738, 7196, 9766, 11476, 19532, 20083, 34181, 38807, 40166, 68362, 77614, 80332, 136724, 155228, 271649, 543298, 737333, 1086596, 1474666, 2949332, 5161331, 10322662, 20645324]

約数ペア:

[(1, 20645324), (2, 10322662), (4, 5161331), (7, 2949332), (14, 1474666), (19, 1086596), (28, 737333), (38, 543298), (76, 271649), (133, 155228), (151, 136724), (257, 80332), (266, 77614), (302, 68362), (514, 40166), (532, 38807), (604, 34181), (1028, 20083), (1057, 19532), (1799, 11476), (2114, 9766), (2869, 7196), (3598, 5738), (4228, 4883)]