20209920

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{277}}^1$

素因数の和:320

約数の個数: 144

約数和(自身を含む): 68187840

約数和(自身を除く): 47977920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 19, 20, 24, 30, 32, 38, 40, 48, 57, 60, 64, 76, 80, 95, 96, 114, 120, 128, 152, 160, 190, 192, 228, 240, 256, 277, 285, 304, 320, 380, 384, 456, 480, 554, 570, 608, 640, 760, 768, 831, 912, 960, 1108, 1140, 1216, 1280, 1385, 1520, 1662, 1824, 1920, 2216, 2280, 2432, 2770, 3040, 3324, 3648, 3840, 4155, 4432, 4560, 4864, 5263, 5540, 6080, 6648, 7296, 8310, 8864, 9120, 10526, 11080, 12160, 13296, 14592, 15789, 16620, 17728, 18240, 21052, 22160, 24320, 26315, 26592, 31578, 33240, 35456, 36480, 42104, 44320, 52630, 53184, 63156, 66480, 70912, 72960, 78945, 84208, 88640, 105260, 106368, 126312, 132960, 157890, 168416, 177280, 210520, 212736, 252624, 265920, 315780, 336832, 354560, 421040, 505248, 531840, 631560, 673664, 842080, 1010496, 1063680, 1263120, 1347328, 1684160, 2020992, 2526240, 3368320, 4041984, 5052480, 6736640, 10104960, 20209920]

約数ペア:

[(1, 20209920), (2, 10104960), (3, 6736640), (4, 5052480), (5, 4041984), (6, 3368320), (8, 2526240), (10, 2020992), (12, 1684160), (15, 1347328), (16, 1263120), (19, 1063680), (20, 1010496), (24, 842080), (30, 673664), (32, 631560), (38, 531840), (40, 505248), (48, 421040), (57, 354560), (60, 336832), (64, 315780), (76, 265920), (80, 252624), (95, 212736), (96, 210520), (114, 177280), (120, 168416), (128, 157890), (152, 132960), (160, 126312), (190, 106368), (192, 105260), (228, 88640), (240, 84208), (256, 78945), (277, 72960), (285, 70912), (304, 66480), (320, 63156), (380, 53184), (384, 52630), (456, 44320), (480, 42104), (554, 36480), (570, 35456), (608, 33240), (640, 31578), (760, 26592), (768, 26315), (831, 24320), (912, 22160), (960, 21052), (1108, 18240), (1140, 17728), (1216, 16620), (1280, 15789), (1385, 14592), (1520, 13296), (1662, 12160), (1824, 11080), (1920, 10526), (2216, 9120), (2280, 8864), (2432, 8310), (2770, 7296), (3040, 6648), (3324, 6080), (3648, 5540), (3840, 5263), (4155, 4864), (4432, 4560)]