21497940

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{971}}^1$

素因数の和:1030

約数の個数: 96

約数和(自身を含む): 68584320

約数和(自身を除く): 47086380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 41, 45, 54, 60, 82, 90, 108, 123, 135, 164, 180, 205, 246, 270, 369, 410, 492, 540, 615, 738, 820, 971, 1107, 1230, 1476, 1845, 1942, 2214, 2460, 2913, 3690, 3884, 4428, 4855, 5535, 5826, 7380, 8739, 9710, 11070, 11652, 14565, 17478, 19420, 22140, 26217, 29130, 34956, 39811, 43695, 52434, 58260, 79622, 87390, 104868, 119433, 131085, 159244, 174780, 199055, 238866, 262170, 358299, 398110, 477732, 524340, 597165, 716598, 796220, 1074897, 1194330, 1433196, 1791495, 2149794, 2388660, 3582990, 4299588, 5374485, 7165980, 10748970, 21497940]

約数ペア:

[(1, 21497940), (2, 10748970), (3, 7165980), (4, 5374485), (5, 4299588), (6, 3582990), (9, 2388660), (10, 2149794), (12, 1791495), (15, 1433196), (18, 1194330), (20, 1074897), (27, 796220), (30, 716598), (36, 597165), (41, 524340), (45, 477732), (54, 398110), (60, 358299), (82, 262170), (90, 238866), (108, 199055), (123, 174780), (135, 159244), (164, 131085), (180, 119433), (205, 104868), (246, 87390), (270, 79622), (369, 58260), (410, 52434), (492, 43695), (540, 39811), (615, 34956), (738, 29130), (820, 26217), (971, 22140), (1107, 19420), (1230, 17478), (1476, 14565), (1845, 11652), (1942, 11070), (2214, 9710), (2460, 8739), (2913, 7380), (3690, 5826), (3884, 5535), (4428, 4855)]