640689920

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{277}}^1$

素因数の和:450

約数の個数: 144

約数和(自身を含む): 1670602080

約数和(自身を除く): 1029912160

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 139, 160, 208, 256, 260, 277, 278, 320, 416, 520, 554, 556, 640, 695, 832, 1040, 1108, 1112, 1280, 1385, 1390, 1664, 1807, 2080, 2216, 2224, 2770, 2780, 3328, 3601, 3614, 4160, 4432, 4448, 5540, 5560, 7202, 7228, 8320, 8864, 8896, 9035, 11080, 11120, 14404, 14456, 16640, 17728, 17792, 18005, 18070, 22160, 22240, 28808, 28912, 35456, 35584, 36010, 36140, 38503, 44320, 44480, 57616, 57824, 70912, 72020, 72280, 77006, 88640, 88960, 115232, 115648, 144040, 144560, 154012, 177280, 177920, 192515, 230464, 231296, 288080, 289120, 308024, 354560, 385030, 460928, 462592, 500539, 576160, 578240, 616048, 770060, 921856, 1001078, 1152320, 1156480, 1232096, 1540120, 2002156, 2304640, 2312960, 2464192, 2502695, 3080240, 4004312, 4609280, 4928384, 5005390, 6160480, 8008624, 9856768, 10010780, 12320960, 16017248, 20021560, 24641920, 32034496, 40043120, 49283840, 64068992, 80086240, 128137984, 160172480, 320344960, 640689920]

約数ペア:

[(1, 640689920), (2, 320344960), (4, 160172480), (5, 128137984), (8, 80086240), (10, 64068992), (13, 49283840), (16, 40043120), (20, 32034496), (26, 24641920), (32, 20021560), (40, 16017248), (52, 12320960), (64, 10010780), (65, 9856768), (80, 8008624), (104, 6160480), (128, 5005390), (130, 4928384), (139, 4609280), (160, 4004312), (208, 3080240), (256, 2502695), (260, 2464192), (277, 2312960), (278, 2304640), (320, 2002156), (416, 1540120), (520, 1232096), (554, 1156480), (556, 1152320), (640, 1001078), (695, 921856), (832, 770060), (1040, 616048), (1108, 578240), (1112, 576160), (1280, 500539), (1385, 462592), (1390, 460928), (1664, 385030), (1807, 354560), (2080, 308024), (2216, 289120), (2224, 288080), (2770, 231296), (2780, 230464), (3328, 192515), (3601, 177920), (3614, 177280), (4160, 154012), (4432, 144560), (4448, 144040), (5540, 115648), (5560, 115232), (7202, 88960), (7228, 88640), (8320, 77006), (8864, 72280), (8896, 72020), (9035, 70912), (11080, 57824), (11120, 57616), (14404, 44480), (14456, 44320), (16640, 38503), (17728, 36140), (17792, 36010), (18005, 35584), (18070, 35456), (22160, 28912), (22240, 28808)]