20538560

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:250

約数の個数: 112

約数和(自身を含む): 57278016

約数和(自身を除く): 36739456

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 53, 56, 64, 70, 80, 106, 112, 140, 160, 173, 212, 224, 265, 280, 320, 346, 371, 424, 448, 530, 560, 692, 742, 848, 865, 1060, 1120, 1211, 1384, 1484, 1696, 1730, 1855, 2120, 2240, 2422, 2768, 2968, 3392, 3460, 3710, 4240, 4844, 5536, 5936, 6055, 6920, 7420, 8480, 9169, 9688, 11072, 11872, 12110, 13840, 14840, 16960, 18338, 19376, 23744, 24220, 27680, 29680, 36676, 38752, 45845, 48440, 55360, 59360, 64183, 73352, 77504, 91690, 96880, 118720, 128366, 146704, 183380, 193760, 256732, 293408, 320915, 366760, 387520, 513464, 586816, 641830, 733520, 1026928, 1283660, 1467040, 2053856, 2567320, 2934080, 4107712, 5134640, 10269280, 20538560]

約数ペア:

[(1, 20538560), (2, 10269280), (4, 5134640), (5, 4107712), (7, 2934080), (8, 2567320), (10, 2053856), (14, 1467040), (16, 1283660), (20, 1026928), (28, 733520), (32, 641830), (35, 586816), (40, 513464), (53, 387520), (56, 366760), (64, 320915), (70, 293408), (80, 256732), (106, 193760), (112, 183380), (140, 146704), (160, 128366), (173, 118720), (212, 96880), (224, 91690), (265, 77504), (280, 73352), (320, 64183), (346, 59360), (371, 55360), (424, 48440), (448, 45845), (530, 38752), (560, 36676), (692, 29680), (742, 27680), (848, 24220), (865, 23744), (1060, 19376), (1120, 18338), (1211, 16960), (1384, 14840), (1484, 13840), (1696, 12110), (1730, 11872), (1855, 11072), (2120, 9688), (2240, 9169), (2422, 8480), (2768, 7420), (2968, 6920), (3392, 6055), (3460, 5936), (3710, 5536), (4240, 4844)]