19919900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1$

素因数の和:244

約数の個数: 144

約数和(自身を含む): 58329600

約数和(自身を除く): 38409700

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 25, 26, 28, 35, 44, 50, 52, 55, 65, 70, 77, 91, 100, 110, 130, 140, 143, 154, 175, 182, 199, 220, 260, 275, 286, 308, 325, 350, 364, 385, 398, 455, 550, 572, 650, 700, 715, 770, 796, 910, 995, 1001, 1100, 1300, 1393, 1430, 1540, 1820, 1925, 1990, 2002, 2189, 2275, 2587, 2786, 2860, 3575, 3850, 3980, 4004, 4378, 4550, 4975, 5005, 5174, 5572, 6965, 7150, 7700, 8756, 9100, 9950, 10010, 10348, 10945, 12935, 13930, 14300, 15323, 18109, 19900, 20020, 21890, 25025, 25870, 27860, 28457, 30646, 34825, 36218, 43780, 50050, 51740, 54725, 56914, 61292, 64675, 69650, 72436, 76615, 90545, 100100, 109450, 113828, 129350, 139300, 142285, 153230, 181090, 199199, 218900, 258700, 284570, 306460, 362180, 383075, 398398, 452725, 569140, 711425, 766150, 796796, 905450, 995995, 1422850, 1532300, 1810900, 1991990, 2845700, 3983980, 4979975, 9959950, 19919900]

約数ペア:

[(1, 19919900), (2, 9959950), (4, 4979975), (5, 3983980), (7, 2845700), (10, 1991990), (11, 1810900), (13, 1532300), (14, 1422850), (20, 995995), (22, 905450), (25, 796796), (26, 766150), (28, 711425), (35, 569140), (44, 452725), (50, 398398), (52, 383075), (55, 362180), (65, 306460), (70, 284570), (77, 258700), (91, 218900), (100, 199199), (110, 181090), (130, 153230), (140, 142285), (143, 139300), (154, 129350), (175, 113828), (182, 109450), (199, 100100), (220, 90545), (260, 76615), (275, 72436), (286, 69650), (308, 64675), (325, 61292), (350, 56914), (364, 54725), (385, 51740), (398, 50050), (455, 43780), (550, 36218), (572, 34825), (650, 30646), (700, 28457), (715, 27860), (770, 25870), (796, 25025), (910, 21890), (995, 20020), (1001, 19900), (1100, 18109), (1300, 15323), (1393, 14300), (1430, 13930), (1540, 12935), (1820, 10945), (1925, 10348), (1990, 10010), (2002, 9950), (2189, 9100), (2275, 8756), (2587, 7700), (2786, 7150), (2860, 6965), (3575, 5572), (3850, 5174), (3980, 5005), (4004, 4975), (4378, 4550)]