21721896

素因数分解:

$2^3\times 3^2\times 7^2\times {\mathrm{47}}^1\times {\mathrm{131}}^1$

素因数の和:204

約数の個数: 144

約数和(自身を含む): 70424640

約数和(自身を除く): 48702744

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 47, 49, 56, 63, 72, 84, 94, 98, 126, 131, 141, 147, 168, 188, 196, 252, 262, 282, 294, 329, 376, 392, 393, 423, 441, 504, 524, 564, 588, 658, 786, 846, 882, 917, 987, 1048, 1128, 1176, 1179, 1316, 1572, 1692, 1764, 1834, 1974, 2303, 2358, 2632, 2751, 2961, 3144, 3384, 3528, 3668, 3948, 4606, 4716, 5502, 5922, 6157, 6419, 6909, 7336, 7896, 8253, 9212, 9432, 11004, 11844, 12314, 12838, 13818, 16506, 18424, 18471, 19257, 20727, 22008, 23688, 24628, 25676, 27636, 33012, 36942, 38514, 41454, 43099, 49256, 51352, 55272, 55413, 57771, 66024, 73884, 77028, 82908, 86198, 110826, 115542, 129297, 147768, 154056, 165816, 172396, 221652, 231084, 258594, 301693, 344792, 387891, 443304, 462168, 517188, 603386, 775782, 905079, 1034376, 1206772, 1551564, 1810158, 2413544, 2715237, 3103128, 3620316, 5430474, 7240632, 10860948, 21721896]

約数ペア:

[(1, 21721896), (2, 10860948), (3, 7240632), (4, 5430474), (6, 3620316), (7, 3103128), (8, 2715237), (9, 2413544), (12, 1810158), (14, 1551564), (18, 1206772), (21, 1034376), (24, 905079), (28, 775782), (36, 603386), (42, 517188), (47, 462168), (49, 443304), (56, 387891), (63, 344792), (72, 301693), (84, 258594), (94, 231084), (98, 221652), (126, 172396), (131, 165816), (141, 154056), (147, 147768), (168, 129297), (188, 115542), (196, 110826), (252, 86198), (262, 82908), (282, 77028), (294, 73884), (329, 66024), (376, 57771), (392, 55413), (393, 55272), (423, 51352), (441, 49256), (504, 43099), (524, 41454), (564, 38514), (588, 36942), (658, 33012), (786, 27636), (846, 25676), (882, 24628), (917, 23688), (987, 22008), (1048, 20727), (1128, 19257), (1176, 18471), (1179, 18424), (1316, 16506), (1572, 13818), (1692, 12838), (1764, 12314), (1834, 11844), (1974, 11004), (2303, 9432), (2358, 9212), (2632, 8253), (2751, 7896), (2961, 7336), (3144, 6909), (3384, 6419), (3528, 6157), (3668, 5922), (3948, 5502), (4606, 4716)]