20488680

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{311}}^1$

素因数の和:392

約数の個数: 128

約数和(自身を含む): 69638400

約数和(自身を除く): 49149720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 61, 72, 90, 108, 120, 122, 135, 180, 183, 216, 244, 270, 305, 311, 360, 366, 488, 540, 549, 610, 622, 732, 915, 933, 1080, 1098, 1220, 1244, 1464, 1555, 1647, 1830, 1866, 2196, 2440, 2488, 2745, 2799, 3110, 3294, 3660, 3732, 4392, 4665, 5490, 5598, 6220, 6588, 7320, 7464, 8235, 8397, 9330, 10980, 11196, 12440, 13176, 13995, 16470, 16794, 18660, 18971, 21960, 22392, 27990, 32940, 33588, 37320, 37942, 41985, 55980, 56913, 65880, 67176, 75884, 83970, 94855, 111960, 113826, 151768, 167940, 170739, 189710, 227652, 284565, 335880, 341478, 379420, 455304, 512217, 569130, 682956, 758840, 853695, 1024434, 1138260, 1365912, 1707390, 2048868, 2276520, 2561085, 3414780, 4097736, 5122170, 6829560, 10244340, 20488680]

約数ペア:

[(1, 20488680), (2, 10244340), (3, 6829560), (4, 5122170), (5, 4097736), (6, 3414780), (8, 2561085), (9, 2276520), (10, 2048868), (12, 1707390), (15, 1365912), (18, 1138260), (20, 1024434), (24, 853695), (27, 758840), (30, 682956), (36, 569130), (40, 512217), (45, 455304), (54, 379420), (60, 341478), (61, 335880), (72, 284565), (90, 227652), (108, 189710), (120, 170739), (122, 167940), (135, 151768), (180, 113826), (183, 111960), (216, 94855), (244, 83970), (270, 75884), (305, 67176), (311, 65880), (360, 56913), (366, 55980), (488, 41985), (540, 37942), (549, 37320), (610, 33588), (622, 32940), (732, 27990), (915, 22392), (933, 21960), (1080, 18971), (1098, 18660), (1220, 16794), (1244, 16470), (1464, 13995), (1555, 13176), (1647, 12440), (1830, 11196), (1866, 10980), (2196, 9330), (2440, 8397), (2488, 8235), (2745, 7464), (2799, 7320), (3110, 6588), (3294, 6220), (3660, 5598), (3732, 5490), (4392, 4665)]