21002004

素因数分解:

$2^2\times 3^5\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:108

約数の個数: 144

約数和(自身を含む): 61641216

約数和(自身を除く): 40639212

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 27, 31, 34, 36, 41, 51, 54, 62, 68, 81, 82, 93, 102, 108, 123, 124, 153, 162, 164, 186, 204, 243, 246, 279, 306, 324, 369, 372, 459, 486, 492, 527, 558, 612, 697, 738, 837, 918, 972, 1054, 1107, 1116, 1271, 1377, 1394, 1476, 1581, 1674, 1836, 2091, 2108, 2214, 2511, 2542, 2754, 2788, 3162, 3321, 3348, 3813, 4131, 4182, 4428, 4743, 5022, 5084, 5508, 6273, 6324, 6642, 7533, 7626, 8262, 8364, 9486, 9963, 10044, 11439, 12546, 13284, 14229, 15066, 15252, 16524, 18819, 18972, 19926, 21607, 22878, 25092, 28458, 30132, 34317, 37638, 39852, 42687, 43214, 45756, 56457, 56916, 64821, 68634, 75276, 85374, 86428, 102951, 112914, 128061, 129642, 137268, 169371, 170748, 194463, 205902, 225828, 256122, 259284, 308853, 338742, 388926, 411804, 512244, 583389, 617706, 677484, 777852, 1166778, 1235412, 1750167, 2333556, 3500334, 5250501, 7000668, 10501002, 21002004]

約数ペア:

[(1, 21002004), (2, 10501002), (3, 7000668), (4, 5250501), (6, 3500334), (9, 2333556), (12, 1750167), (17, 1235412), (18, 1166778), (27, 777852), (31, 677484), (34, 617706), (36, 583389), (41, 512244), (51, 411804), (54, 388926), (62, 338742), (68, 308853), (81, 259284), (82, 256122), (93, 225828), (102, 205902), (108, 194463), (123, 170748), (124, 169371), (153, 137268), (162, 129642), (164, 128061), (186, 112914), (204, 102951), (243, 86428), (246, 85374), (279, 75276), (306, 68634), (324, 64821), (369, 56916), (372, 56457), (459, 45756), (486, 43214), (492, 42687), (527, 39852), (558, 37638), (612, 34317), (697, 30132), (738, 28458), (837, 25092), (918, 22878), (972, 21607), (1054, 19926), (1107, 18972), (1116, 18819), (1271, 16524), (1377, 15252), (1394, 15066), (1476, 14229), (1581, 13284), (1674, 12546), (1836, 11439), (2091, 10044), (2108, 9963), (2214, 9486), (2511, 8364), (2542, 8262), (2754, 7626), (2788, 7533), (3162, 6642), (3321, 6324), (3348, 6273), (3813, 5508), (4131, 5084), (4182, 5022), (4428, 4743)]