21125880

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{631}}^1$

素因数の和:682

約数の個数: 128

約数和(自身を含む): 72806400

約数和(自身を除く): 51680520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 31, 36, 40, 45, 54, 60, 62, 72, 90, 93, 108, 120, 124, 135, 155, 180, 186, 216, 248, 270, 279, 310, 360, 372, 465, 540, 558, 620, 631, 744, 837, 930, 1080, 1116, 1240, 1262, 1395, 1674, 1860, 1893, 2232, 2524, 2790, 3155, 3348, 3720, 3786, 4185, 5048, 5580, 5679, 6310, 6696, 7572, 8370, 9465, 11160, 11358, 12620, 15144, 16740, 17037, 18930, 19561, 22716, 25240, 28395, 33480, 34074, 37860, 39122, 45432, 56790, 58683, 68148, 75720, 78244, 85185, 97805, 113580, 117366, 136296, 156488, 170370, 176049, 195610, 227160, 234732, 293415, 340740, 352098, 391220, 469464, 528147, 586830, 681480, 704196, 782440, 880245, 1056294, 1173660, 1408392, 1760490, 2112588, 2347320, 2640735, 3520980, 4225176, 5281470, 7041960, 10562940, 21125880]

約数ペア:

[(1, 21125880), (2, 10562940), (3, 7041960), (4, 5281470), (5, 4225176), (6, 3520980), (8, 2640735), (9, 2347320), (10, 2112588), (12, 1760490), (15, 1408392), (18, 1173660), (20, 1056294), (24, 880245), (27, 782440), (30, 704196), (31, 681480), (36, 586830), (40, 528147), (45, 469464), (54, 391220), (60, 352098), (62, 340740), (72, 293415), (90, 234732), (93, 227160), (108, 195610), (120, 176049), (124, 170370), (135, 156488), (155, 136296), (180, 117366), (186, 113580), (216, 97805), (248, 85185), (270, 78244), (279, 75720), (310, 68148), (360, 58683), (372, 56790), (465, 45432), (540, 39122), (558, 37860), (620, 34074), (631, 33480), (744, 28395), (837, 25240), (930, 22716), (1080, 19561), (1116, 18930), (1240, 17037), (1262, 16740), (1395, 15144), (1674, 12620), (1860, 11358), (1893, 11160), (2232, 9465), (2524, 8370), (2790, 7572), (3155, 6696), (3348, 6310), (3720, 5679), (3786, 5580), (4185, 5048)]