21595520

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{823}}^1$

素因数の和:883

約数の個数: 64

約数和(自身を含む): 52950240

約数和(自身を除く): 31354720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 640, 656, 820, 823, 1312, 1640, 1646, 2624, 3280, 3292, 4115, 5248, 6560, 6584, 8230, 13120, 13168, 16460, 26240, 26336, 32920, 33743, 52672, 65840, 67486, 105344, 131680, 134972, 168715, 263360, 269944, 337430, 526720, 539888, 674860, 1079776, 1349720, 2159552, 2699440, 4319104, 5398880, 10797760, 21595520]

約数ペア:

[(1, 21595520), (2, 10797760), (4, 5398880), (5, 4319104), (8, 2699440), (10, 2159552), (16, 1349720), (20, 1079776), (32, 674860), (40, 539888), (41, 526720), (64, 337430), (80, 269944), (82, 263360), (128, 168715), (160, 134972), (164, 131680), (205, 105344), (320, 67486), (328, 65840), (410, 52672), (640, 33743), (656, 32920), (820, 26336), (823, 26240), (1312, 16460), (1640, 13168), (1646, 13120), (2624, 8230), (3280, 6584), (3292, 6560), (4115, 5248)]