19847940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:226

約数の個数: 144

約数和(自身を含む): 66572352

約数和(自身を除く): 46724412

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 43, 49, 60, 70, 84, 86, 98, 105, 129, 140, 147, 157, 172, 196, 210, 215, 245, 258, 294, 301, 314, 420, 430, 471, 490, 516, 588, 602, 628, 645, 735, 785, 860, 903, 942, 980, 1099, 1204, 1290, 1470, 1505, 1570, 1806, 1884, 2107, 2198, 2355, 2580, 2940, 3010, 3140, 3297, 3612, 4214, 4396, 4515, 4710, 5495, 6020, 6321, 6594, 6751, 7693, 8428, 9030, 9420, 10535, 10990, 12642, 13188, 13502, 15386, 16485, 18060, 20253, 21070, 21980, 23079, 25284, 27004, 30772, 31605, 32970, 33755, 38465, 40506, 42140, 46158, 47257, 63210, 65940, 67510, 76930, 81012, 92316, 94514, 101265, 115395, 126420, 135020, 141771, 153860, 189028, 202530, 230790, 236285, 283542, 330799, 405060, 461580, 472570, 567084, 661598, 708855, 945140, 992397, 1323196, 1417710, 1653995, 1984794, 2835420, 3307990, 3969588, 4961985, 6615980, 9923970, 19847940]

約数ペア:

[(1, 19847940), (2, 9923970), (3, 6615980), (4, 4961985), (5, 3969588), (6, 3307990), (7, 2835420), (10, 1984794), (12, 1653995), (14, 1417710), (15, 1323196), (20, 992397), (21, 945140), (28, 708855), (30, 661598), (35, 567084), (42, 472570), (43, 461580), (49, 405060), (60, 330799), (70, 283542), (84, 236285), (86, 230790), (98, 202530), (105, 189028), (129, 153860), (140, 141771), (147, 135020), (157, 126420), (172, 115395), (196, 101265), (210, 94514), (215, 92316), (245, 81012), (258, 76930), (294, 67510), (301, 65940), (314, 63210), (420, 47257), (430, 46158), (471, 42140), (490, 40506), (516, 38465), (588, 33755), (602, 32970), (628, 31605), (645, 30772), (735, 27004), (785, 25284), (860, 23079), (903, 21980), (942, 21070), (980, 20253), (1099, 18060), (1204, 16485), (1290, 15386), (1470, 13502), (1505, 13188), (1570, 12642), (1806, 10990), (1884, 10535), (2107, 9420), (2198, 9030), (2355, 8428), (2580, 7693), (2940, 6751), (3010, 6594), (3140, 6321), (3297, 6020), (3612, 5495), (4214, 4710), (4396, 4515)]