21008000

素因数分解:

$2^7\times 5^3\times {\mathrm{13}}^1\times {\mathrm{101}}^1$

素因数の和:143

約数の個数: 128

約数和(自身を含む): 56805840

約数和(自身を除く): 35797840

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 101, 104, 125, 128, 130, 160, 200, 202, 208, 250, 260, 320, 325, 400, 404, 416, 500, 505, 520, 640, 650, 800, 808, 832, 1000, 1010, 1040, 1300, 1313, 1600, 1616, 1625, 1664, 2000, 2020, 2080, 2525, 2600, 2626, 3200, 3232, 3250, 4000, 4040, 4160, 5050, 5200, 5252, 6464, 6500, 6565, 8000, 8080, 8320, 10100, 10400, 10504, 12625, 12928, 13000, 13130, 16000, 16160, 20200, 20800, 21008, 25250, 26000, 26260, 32320, 32825, 40400, 41600, 42016, 50500, 52000, 52520, 64640, 65650, 80800, 84032, 101000, 104000, 105040, 131300, 161600, 164125, 168064, 202000, 208000, 210080, 262600, 323200, 328250, 404000, 420160, 525200, 656500, 808000, 840320, 1050400, 1313000, 1616000, 2100800, 2626000, 4201600, 5252000, 10504000, 21008000]

約数ペア:

[(1, 21008000), (2, 10504000), (4, 5252000), (5, 4201600), (8, 2626000), (10, 2100800), (13, 1616000), (16, 1313000), (20, 1050400), (25, 840320), (26, 808000), (32, 656500), (40, 525200), (50, 420160), (52, 404000), (64, 328250), (65, 323200), (80, 262600), (100, 210080), (101, 208000), (104, 202000), (125, 168064), (128, 164125), (130, 161600), (160, 131300), (200, 105040), (202, 104000), (208, 101000), (250, 84032), (260, 80800), (320, 65650), (325, 64640), (400, 52520), (404, 52000), (416, 50500), (500, 42016), (505, 41600), (520, 40400), (640, 32825), (650, 32320), (800, 26260), (808, 26000), (832, 25250), (1000, 21008), (1010, 20800), (1040, 20200), (1300, 16160), (1313, 16000), (1600, 13130), (1616, 13000), (1625, 12928), (1664, 12625), (2000, 10504), (2020, 10400), (2080, 10100), (2525, 8320), (2600, 8080), (2626, 8000), (3200, 6565), (3232, 6500), (3250, 6464), (4000, 5252), (4040, 5200), (4160, 5050)]