20285440

素因数分解:

$2^{11}\times 5^1\times 7^1\times {\mathrm{283}}^1$

素因数の和:317

約数の個数: 96

約数和(自身を含む): 55823040

約数和(自身を除く): 35537600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 283, 320, 448, 512, 560, 566, 640, 896, 1024, 1120, 1132, 1280, 1415, 1792, 1981, 2048, 2240, 2264, 2560, 2830, 3584, 3962, 4480, 4528, 5120, 5660, 7168, 7924, 8960, 9056, 9905, 10240, 11320, 14336, 15848, 17920, 18112, 19810, 22640, 31696, 35840, 36224, 39620, 45280, 63392, 71680, 72448, 79240, 90560, 126784, 144896, 158480, 181120, 253568, 289792, 316960, 362240, 507136, 579584, 633920, 724480, 1014272, 1267840, 1448960, 2028544, 2535680, 2897920, 4057088, 5071360, 10142720, 20285440]

約数ペア:

[(1, 20285440), (2, 10142720), (4, 5071360), (5, 4057088), (7, 2897920), (8, 2535680), (10, 2028544), (14, 1448960), (16, 1267840), (20, 1014272), (28, 724480), (32, 633920), (35, 579584), (40, 507136), (56, 362240), (64, 316960), (70, 289792), (80, 253568), (112, 181120), (128, 158480), (140, 144896), (160, 126784), (224, 90560), (256, 79240), (280, 72448), (283, 71680), (320, 63392), (448, 45280), (512, 39620), (560, 36224), (566, 35840), (640, 31696), (896, 22640), (1024, 19810), (1120, 18112), (1132, 17920), (1280, 15848), (1415, 14336), (1792, 11320), (1981, 10240), (2048, 9905), (2240, 9056), (2264, 8960), (2560, 7924), (2830, 7168), (3584, 5660), (3962, 5120), (4480, 4528)]