20992960

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^2\times {\mathrm{227}}^1$

素因数の和:278

約数の個数: 84

約数和(自身を含む): 53336952

約数和(自身を除く): 32343992

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 227, 272, 289, 320, 340, 454, 544, 578, 680, 908, 1088, 1135, 1156, 1360, 1445, 1816, 2270, 2312, 2720, 2890, 3632, 3859, 4540, 4624, 5440, 5780, 7264, 7718, 9080, 9248, 11560, 14528, 15436, 18160, 18496, 19295, 23120, 30872, 36320, 38590, 46240, 61744, 65603, 72640, 77180, 92480, 123488, 131206, 154360, 246976, 262412, 308720, 328015, 524824, 617440, 656030, 1049648, 1234880, 1312060, 2099296, 2624120, 4198592, 5248240, 10496480, 20992960]

約数ペア:

[(1, 20992960), (2, 10496480), (4, 5248240), (5, 4198592), (8, 2624120), (10, 2099296), (16, 1312060), (17, 1234880), (20, 1049648), (32, 656030), (34, 617440), (40, 524824), (64, 328015), (68, 308720), (80, 262412), (85, 246976), (136, 154360), (160, 131206), (170, 123488), (227, 92480), (272, 77180), (289, 72640), (320, 65603), (340, 61744), (454, 46240), (544, 38590), (578, 36320), (680, 30872), (908, 23120), (1088, 19295), (1135, 18496), (1156, 18160), (1360, 15436), (1445, 14528), (1816, 11560), (2270, 9248), (2312, 9080), (2720, 7718), (2890, 7264), (3632, 5780), (3859, 5440), (4540, 4624)]