81520640

素因数分解:

$2^{11}\times 5^1\times {\mathrm{19}}^1\times {\mathrm{419}}^1$

素因数の和:465

約数の個数: 96

約数和(自身を含む): 206388000

約数和(自身を除く): 124867360

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 419, 512, 608, 640, 760, 838, 1024, 1216, 1280, 1520, 1676, 2048, 2095, 2432, 2560, 3040, 3352, 4190, 4864, 5120, 6080, 6704, 7961, 8380, 9728, 10240, 12160, 13408, 15922, 16760, 19456, 24320, 26816, 31844, 33520, 38912, 39805, 48640, 53632, 63688, 67040, 79610, 97280, 107264, 127376, 134080, 159220, 194560, 214528, 254752, 268160, 318440, 429056, 509504, 536320, 636880, 858112, 1019008, 1072640, 1273760, 2038016, 2145280, 2547520, 4076032, 4290560, 5095040, 8152064, 10190080, 16304128, 20380160, 40760320, 81520640]

約数ペア:

[(1, 81520640), (2, 40760320), (4, 20380160), (5, 16304128), (8, 10190080), (10, 8152064), (16, 5095040), (19, 4290560), (20, 4076032), (32, 2547520), (38, 2145280), (40, 2038016), (64, 1273760), (76, 1072640), (80, 1019008), (95, 858112), (128, 636880), (152, 536320), (160, 509504), (190, 429056), (256, 318440), (304, 268160), (320, 254752), (380, 214528), (419, 194560), (512, 159220), (608, 134080), (640, 127376), (760, 107264), (838, 97280), (1024, 79610), (1216, 67040), (1280, 63688), (1520, 53632), (1676, 48640), (2048, 39805), (2095, 38912), (2432, 33520), (2560, 31844), (3040, 26816), (3352, 24320), (4190, 19456), (4864, 16760), (5120, 15922), (6080, 13408), (6704, 12160), (7961, 10240), (8380, 9728)]