21447540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:238

約数の個数: 144

約数和(自身を含む): 70918848

約数和(自身を除く): 49471308

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 43, 45, 51, 60, 68, 85, 86, 90, 102, 129, 153, 163, 170, 172, 180, 204, 215, 255, 258, 306, 326, 340, 387, 430, 489, 510, 516, 612, 645, 652, 731, 765, 774, 815, 860, 978, 1020, 1290, 1462, 1467, 1530, 1548, 1630, 1935, 1956, 2193, 2445, 2580, 2771, 2924, 2934, 3060, 3260, 3655, 3870, 4386, 4890, 5542, 5868, 6579, 7009, 7310, 7335, 7740, 8313, 8772, 9780, 10965, 11084, 13158, 13855, 14018, 14620, 14670, 16626, 21027, 21930, 24939, 26316, 27710, 28036, 29340, 32895, 33252, 35045, 41565, 42054, 43860, 49878, 55420, 63081, 65790, 70090, 83130, 84108, 99756, 105135, 119153, 124695, 126162, 131580, 140180, 166260, 210270, 238306, 249390, 252324, 315405, 357459, 420540, 476612, 498780, 595765, 630810, 714918, 1072377, 1191530, 1261620, 1429836, 1787295, 2144754, 2383060, 3574590, 4289508, 5361885, 7149180, 10723770, 21447540]

約数ペア:

[(1, 21447540), (2, 10723770), (3, 7149180), (4, 5361885), (5, 4289508), (6, 3574590), (9, 2383060), (10, 2144754), (12, 1787295), (15, 1429836), (17, 1261620), (18, 1191530), (20, 1072377), (30, 714918), (34, 630810), (36, 595765), (43, 498780), (45, 476612), (51, 420540), (60, 357459), (68, 315405), (85, 252324), (86, 249390), (90, 238306), (102, 210270), (129, 166260), (153, 140180), (163, 131580), (170, 126162), (172, 124695), (180, 119153), (204, 105135), (215, 99756), (255, 84108), (258, 83130), (306, 70090), (326, 65790), (340, 63081), (387, 55420), (430, 49878), (489, 43860), (510, 42054), (516, 41565), (612, 35045), (645, 33252), (652, 32895), (731, 29340), (765, 28036), (774, 27710), (815, 26316), (860, 24939), (978, 21930), (1020, 21027), (1290, 16626), (1462, 14670), (1467, 14620), (1530, 14018), (1548, 13855), (1630, 13158), (1935, 11084), (1956, 10965), (2193, 9780), (2445, 8772), (2580, 8313), (2771, 7740), (2924, 7335), (2934, 7310), (3060, 7009), (3260, 6579), (3655, 5868), (3870, 5542), (4386, 4890)]