21408786

素因数分解:

$2^1\times 3^5\times 7^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:91

約数の個数: 144

約数和(自身を含む): 59754240

約数和(自身を除く): 38345454

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 29, 31, 42, 49, 54, 58, 62, 63, 81, 87, 93, 98, 126, 147, 162, 174, 186, 189, 203, 217, 243, 261, 279, 294, 378, 406, 434, 441, 486, 522, 558, 567, 609, 651, 783, 837, 882, 899, 1134, 1218, 1302, 1323, 1421, 1519, 1566, 1674, 1701, 1798, 1827, 1953, 2349, 2511, 2646, 2697, 2842, 3038, 3402, 3654, 3906, 3969, 4263, 4557, 4698, 5022, 5394, 5481, 5859, 6293, 7047, 7533, 7938, 8091, 8526, 9114, 10962, 11718, 11907, 12586, 12789, 13671, 14094, 15066, 16182, 16443, 17577, 18879, 23814, 24273, 25578, 27342, 32886, 35154, 37758, 38367, 41013, 44051, 48546, 49329, 52731, 56637, 72819, 76734, 82026, 88102, 98658, 105462, 113274, 115101, 123039, 132153, 145638, 169911, 218457, 230202, 246078, 264306, 339822, 345303, 369117, 396459, 436914, 509733, 690606, 738234, 792918, 1019466, 1189377, 1529199, 2378754, 3058398, 3568131, 7136262, 10704393, 21408786]

約数ペア:

[(1, 21408786), (2, 10704393), (3, 7136262), (6, 3568131), (7, 3058398), (9, 2378754), (14, 1529199), (18, 1189377), (21, 1019466), (27, 792918), (29, 738234), (31, 690606), (42, 509733), (49, 436914), (54, 396459), (58, 369117), (62, 345303), (63, 339822), (81, 264306), (87, 246078), (93, 230202), (98, 218457), (126, 169911), (147, 145638), (162, 132153), (174, 123039), (186, 115101), (189, 113274), (203, 105462), (217, 98658), (243, 88102), (261, 82026), (279, 76734), (294, 72819), (378, 56637), (406, 52731), (434, 49329), (441, 48546), (486, 44051), (522, 41013), (558, 38367), (567, 37758), (609, 35154), (651, 32886), (783, 27342), (837, 25578), (882, 24273), (899, 23814), (1134, 18879), (1218, 17577), (1302, 16443), (1323, 16182), (1421, 15066), (1519, 14094), (1566, 13671), (1674, 12789), (1701, 12586), (1798, 11907), (1827, 11718), (1953, 10962), (2349, 9114), (2511, 8526), (2646, 8091), (2697, 7938), (2842, 7533), (3038, 7047), (3402, 6293), (3654, 5859), (3906, 5481), (3969, 5394), (4263, 5022), (4557, 4698)]