21000000567

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{271}}^1\times {\mathrm{283}}^1$

素因数の和:653

約数の個数: 128

約数和(自身を含む): 37375672320

約数和(自身を除く): 16375671753

約数列:

[1, 3, 7, 13, 17, 21, 39, 51, 59, 91, 119, 177, 221, 271, 273, 283, 357, 413, 663, 767, 813, 849, 1003, 1239, 1547, 1897, 1981, 2301, 3009, 3523, 3679, 4607, 4641, 4811, 5369, 5691, 5943, 7021, 10569, 11037, 13039, 13821, 14433, 15989, 16107, 16697, 21063, 24661, 25753, 32249, 33677, 39117, 47967, 50091, 59891, 62543, 73983, 76693, 77259, 91273, 96747, 101031, 111923, 116879, 179673, 187629, 207857, 217061, 230079, 271813, 273819, 283849, 335769, 350637, 419237, 437801, 536851, 623571, 651183, 815439, 851547, 997009, 1257711, 1303781, 1313403, 1454999, 1519427, 1610553, 1902691, 1986943, 2991027, 3533569, 3690037, 3911343, 4364997, 4524887, 4558281, 5708073, 5960829, 6979063, 9126467, 10600707, 11070111, 13574661, 16949153, 20937189, 24734983, 25830259, 27379401, 31674209, 50847459, 58823531, 74204949, 76923079, 77490777, 95022627, 118644071, 176470593, 230769237, 355932213, 411764717, 538461553, 1000000027, 1235294151, 1615384659, 3000000081, 7000000189, 21000000567]

約数ペア:

[(1, 21000000567), (3, 7000000189), (7, 3000000081), (13, 1615384659), (17, 1235294151), (21, 1000000027), (39, 538461553), (51, 411764717), (59, 355932213), (91, 230769237), (119, 176470593), (177, 118644071), (221, 95022627), (271, 77490777), (273, 76923079), (283, 74204949), (357, 58823531), (413, 50847459), (663, 31674209), (767, 27379401), (813, 25830259), (849, 24734983), (1003, 20937189), (1239, 16949153), (1547, 13574661), (1897, 11070111), (1981, 10600707), (2301, 9126467), (3009, 6979063), (3523, 5960829), (3679, 5708073), (4607, 4558281), (4641, 4524887), (4811, 4364997), (5369, 3911343), (5691, 3690037), (5943, 3533569), (7021, 2991027), (10569, 1986943), (11037, 1902691), (13039, 1610553), (13821, 1519427), (14433, 1454999), (15989, 1313403), (16107, 1303781), (16697, 1257711), (21063, 997009), (24661, 851547), (25753, 815439), (32249, 651183), (33677, 623571), (39117, 536851), (47967, 437801), (50091, 419237), (59891, 350637), (62543, 335769), (73983, 283849), (76693, 273819), (77259, 271813), (91273, 230079), (96747, 217061), (101031, 207857), (111923, 187629), (116879, 179673)]