19940040

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{499}}^1$

素因数の和:556

約数の個数: 128

約数和(自身を含む): 68400000

約数和(自身を除く): 48459960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 37, 40, 45, 54, 60, 72, 74, 90, 108, 111, 120, 135, 148, 180, 185, 216, 222, 270, 296, 333, 360, 370, 444, 499, 540, 555, 666, 740, 888, 998, 999, 1080, 1110, 1332, 1480, 1497, 1665, 1996, 1998, 2220, 2495, 2664, 2994, 3330, 3992, 3996, 4440, 4491, 4990, 4995, 5988, 6660, 7485, 7992, 8982, 9980, 9990, 11976, 13320, 13473, 14970, 17964, 18463, 19960, 19980, 22455, 26946, 29940, 35928, 36926, 39960, 44910, 53892, 55389, 59880, 67365, 73852, 89820, 92315, 107784, 110778, 134730, 147704, 166167, 179640, 184630, 221556, 269460, 276945, 332334, 369260, 443112, 498501, 538920, 553890, 664668, 738520, 830835, 997002, 1107780, 1329336, 1661670, 1994004, 2215560, 2492505, 3323340, 3988008, 4985010, 6646680, 9970020, 19940040]

約数ペア:

[(1, 19940040), (2, 9970020), (3, 6646680), (4, 4985010), (5, 3988008), (6, 3323340), (8, 2492505), (9, 2215560), (10, 1994004), (12, 1661670), (15, 1329336), (18, 1107780), (20, 997002), (24, 830835), (27, 738520), (30, 664668), (36, 553890), (37, 538920), (40, 498501), (45, 443112), (54, 369260), (60, 332334), (72, 276945), (74, 269460), (90, 221556), (108, 184630), (111, 179640), (120, 166167), (135, 147704), (148, 134730), (180, 110778), (185, 107784), (216, 92315), (222, 89820), (270, 73852), (296, 67365), (333, 59880), (360, 55389), (370, 53892), (444, 44910), (499, 39960), (540, 36926), (555, 35928), (666, 29940), (740, 26946), (888, 22455), (998, 19980), (999, 19960), (1080, 18463), (1110, 17964), (1332, 14970), (1480, 13473), (1497, 13320), (1665, 11976), (1996, 9990), (1998, 9980), (2220, 8982), (2495, 7992), (2664, 7485), (2994, 6660), (3330, 5988), (3992, 4995), (3996, 4990), (4440, 4491)]