20821528

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{773}}^1$

素因数の和:836

約数の個数: 64

約数和(自身を含む): 49412160

約数和(自身を除く): 28590632

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 37, 52, 56, 74, 91, 104, 148, 182, 259, 296, 364, 481, 518, 728, 773, 962, 1036, 1546, 1924, 2072, 3092, 3367, 3848, 5411, 6184, 6734, 10049, 10822, 13468, 20098, 21644, 26936, 28601, 40196, 43288, 57202, 70343, 80392, 114404, 140686, 200207, 228808, 281372, 371813, 400414, 562744, 743626, 800828, 1487252, 1601656, 2602691, 2974504, 5205382, 10410764, 20821528]

約数ペア:

[(1, 20821528), (2, 10410764), (4, 5205382), (7, 2974504), (8, 2602691), (13, 1601656), (14, 1487252), (26, 800828), (28, 743626), (37, 562744), (52, 400414), (56, 371813), (74, 281372), (91, 228808), (104, 200207), (148, 140686), (182, 114404), (259, 80392), (296, 70343), (364, 57202), (481, 43288), (518, 40196), (728, 28601), (773, 26936), (962, 21644), (1036, 20098), (1546, 13468), (1924, 10822), (2072, 10049), (3092, 6734), (3367, 6184), (3848, 5411)]