21349520

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{283}}^1$

素因数の和:360

約数の個数: 80

約数和(自身を含む): 53246592

約数和(自身を除く): 31897072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 41, 46, 80, 82, 92, 115, 164, 184, 205, 230, 283, 328, 368, 410, 460, 566, 656, 820, 920, 943, 1132, 1415, 1640, 1840, 1886, 2264, 2830, 3280, 3772, 4528, 4715, 5660, 6509, 7544, 9430, 11320, 11603, 13018, 15088, 18860, 22640, 23206, 26036, 32545, 37720, 46412, 52072, 58015, 65090, 75440, 92824, 104144, 116030, 130180, 185648, 232060, 260360, 266869, 464120, 520720, 533738, 928240, 1067476, 1334345, 2134952, 2668690, 4269904, 5337380, 10674760, 21349520]

約数ペア:

[(1, 21349520), (2, 10674760), (4, 5337380), (5, 4269904), (8, 2668690), (10, 2134952), (16, 1334345), (20, 1067476), (23, 928240), (40, 533738), (41, 520720), (46, 464120), (80, 266869), (82, 260360), (92, 232060), (115, 185648), (164, 130180), (184, 116030), (205, 104144), (230, 92824), (283, 75440), (328, 65090), (368, 58015), (410, 52072), (460, 46412), (566, 37720), (656, 32545), (820, 26036), (920, 23206), (943, 22640), (1132, 18860), (1415, 15088), (1640, 13018), (1840, 11603), (1886, 11320), (2264, 9430), (2830, 7544), (3280, 6509), (3772, 5660), (4528, 4715)]