647843456

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:738

約数の個数: 128

約数和(自身を含む): 1512537600

約数和(自身を除く): 864694144

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 31, 32, 38, 52, 62, 64, 76, 104, 124, 128, 152, 208, 247, 248, 304, 403, 416, 494, 496, 589, 608, 661, 806, 832, 988, 992, 1178, 1216, 1322, 1612, 1664, 1976, 1984, 2356, 2432, 2644, 3224, 3952, 3968, 4712, 5288, 6448, 7657, 7904, 8593, 9424, 10576, 12559, 12896, 15314, 15808, 17186, 18848, 20491, 21152, 25118, 25792, 30628, 31616, 34372, 37696, 40982, 42304, 50236, 51584, 61256, 68744, 75392, 81964, 84608, 100472, 122512, 137488, 163267, 163928, 200944, 245024, 266383, 274976, 326534, 327856, 389329, 401888, 490048, 532766, 549952, 653068, 655712, 778658, 803776, 980096, 1065532, 1099904, 1306136, 1311424, 1557316, 1607552, 2131064, 2612272, 2622848, 3114632, 4262128, 5061277, 5224544, 6229264, 8524256, 10122554, 10449088, 12458528, 17048512, 20245108, 20898176, 24917056, 34097024, 40490216, 49834112, 80980432, 161960864, 323921728, 647843456]

約数ペア:

[(1, 647843456), (2, 323921728), (4, 161960864), (8, 80980432), (13, 49834112), (16, 40490216), (19, 34097024), (26, 24917056), (31, 20898176), (32, 20245108), (38, 17048512), (52, 12458528), (62, 10449088), (64, 10122554), (76, 8524256), (104, 6229264), (124, 5224544), (128, 5061277), (152, 4262128), (208, 3114632), (247, 2622848), (248, 2612272), (304, 2131064), (403, 1607552), (416, 1557316), (494, 1311424), (496, 1306136), (589, 1099904), (608, 1065532), (661, 980096), (806, 803776), (832, 778658), (988, 655712), (992, 653068), (1178, 549952), (1216, 532766), (1322, 490048), (1612, 401888), (1664, 389329), (1976, 327856), (1984, 326534), (2356, 274976), (2432, 266383), (2644, 245024), (3224, 200944), (3952, 163928), (3968, 163267), (4712, 137488), (5288, 122512), (6448, 100472), (7657, 84608), (7904, 81964), (8593, 75392), (9424, 68744), (10576, 61256), (12559, 51584), (12896, 50236), (15314, 42304), (15808, 40982), (17186, 37696), (18848, 34372), (20491, 31616), (21152, 30628), (25118, 25792)]