40019980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1999}}^1$

素因数の和:2039

約数の個数: 96

約数和(自身を含む): 112896000

約数和(自身を除く): 72876020

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 572, 715, 770, 910, 1001, 1430, 1540, 1820, 1999, 2002, 2860, 3998, 4004, 5005, 7996, 9995, 10010, 13993, 19990, 20020, 21989, 25987, 27986, 39980, 43978, 51974, 55972, 69965, 87956, 103948, 109945, 129935, 139930, 153923, 181909, 219890, 259870, 279860, 285857, 307846, 363818, 439780, 519740, 571714, 615692, 727636, 769615, 909545, 1143428, 1429285, 1539230, 1819090, 2000999, 2858570, 3078460, 3638180, 4001998, 5717140, 8003996, 10004995, 20009990, 40019980]

約数ペア:

[(1, 40019980), (2, 20009990), (4, 10004995), (5, 8003996), (7, 5717140), (10, 4001998), (11, 3638180), (13, 3078460), (14, 2858570), (20, 2000999), (22, 1819090), (26, 1539230), (28, 1429285), (35, 1143428), (44, 909545), (52, 769615), (55, 727636), (65, 615692), (70, 571714), (77, 519740), (91, 439780), (110, 363818), (130, 307846), (140, 285857), (143, 279860), (154, 259870), (182, 219890), (220, 181909), (260, 153923), (286, 139930), (308, 129935), (364, 109945), (385, 103948), (455, 87956), (572, 69965), (715, 55972), (770, 51974), (910, 43978), (1001, 39980), (1430, 27986), (1540, 25987), (1820, 21989), (1999, 20020), (2002, 19990), (2860, 13993), (3998, 10010), (4004, 9995), (5005, 7996)]