640961280

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{55639}}^1$

素因数の和:55666

約数の個数: 108

約数和(自身を含む): 2217699120

約数和(自身を除く): 1576737840

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 64, 72, 80, 90, 96, 120, 128, 144, 160, 180, 192, 240, 256, 288, 320, 360, 384, 480, 576, 640, 720, 768, 960, 1152, 1280, 1440, 1920, 2304, 2880, 3840, 5760, 11520, 55639, 111278, 166917, 222556, 278195, 333834, 445112, 500751, 556390, 667668, 834585, 890224, 1001502, 1112780, 1335336, 1669170, 1780448, 2003004, 2225560, 2503755, 2670672, 3338340, 3560896, 4006008, 4451120, 5007510, 5341344, 6676680, 7121792, 8012016, 8902240, 10015020, 10682688, 13353360, 14243584, 16024032, 17804480, 20030040, 21365376, 26706720, 32048064, 35608960, 40060080, 42730752, 53413440, 64096128, 71217920, 80120160, 106826880, 128192256, 160240320, 213653760, 320480640, 640961280]

約数ペア:

[(1, 640961280), (2, 320480640), (3, 213653760), (4, 160240320), (5, 128192256), (6, 106826880), (8, 80120160), (9, 71217920), (10, 64096128), (12, 53413440), (15, 42730752), (16, 40060080), (18, 35608960), (20, 32048064), (24, 26706720), (30, 21365376), (32, 20030040), (36, 17804480), (40, 16024032), (45, 14243584), (48, 13353360), (60, 10682688), (64, 10015020), (72, 8902240), (80, 8012016), (90, 7121792), (96, 6676680), (120, 5341344), (128, 5007510), (144, 4451120), (160, 4006008), (180, 3560896), (192, 3338340), (240, 2670672), (256, 2503755), (288, 2225560), (320, 2003004), (360, 1780448), (384, 1669170), (480, 1335336), (576, 1112780), (640, 1001502), (720, 890224), (768, 834585), (960, 667668), (1152, 556390), (1280, 500751), (1440, 445112), (1920, 333834), (2304, 278195), (2880, 222556), (3840, 166917), (5760, 111278), (11520, 55639)]