20506880

素因数分解:

$2^8\times 5^1\times {\mathrm{37}}^1\times {\mathrm{433}}^1$

素因数の和:491

約数の個数: 72

約数和(自身を含む): 50564472

約数和(自身を除く): 30057592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 256, 296, 320, 370, 433, 592, 640, 740, 866, 1184, 1280, 1480, 1732, 2165, 2368, 2960, 3464, 4330, 4736, 5920, 6928, 8660, 9472, 11840, 13856, 16021, 17320, 23680, 27712, 32042, 34640, 47360, 55424, 64084, 69280, 80105, 110848, 128168, 138560, 160210, 256336, 277120, 320420, 512672, 554240, 640840, 1025344, 1281680, 2050688, 2563360, 4101376, 5126720, 10253440, 20506880]

約数ペア:

[(1, 20506880), (2, 10253440), (4, 5126720), (5, 4101376), (8, 2563360), (10, 2050688), (16, 1281680), (20, 1025344), (32, 640840), (37, 554240), (40, 512672), (64, 320420), (74, 277120), (80, 256336), (128, 160210), (148, 138560), (160, 128168), (185, 110848), (256, 80105), (296, 69280), (320, 64084), (370, 55424), (433, 47360), (592, 34640), (640, 32042), (740, 27712), (866, 23680), (1184, 17320), (1280, 16021), (1480, 13856), (1732, 11840), (2165, 9472), (2368, 8660), (2960, 6928), (3464, 5920), (4330, 4736)]