21389040

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{487}}^1$

素因数の和:567

約数の個数: 120

約数和(自身を含む): 73159008

約数和(自身を除く): 51769968

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 61, 72, 80, 90, 120, 122, 144, 180, 183, 240, 244, 305, 360, 366, 487, 488, 549, 610, 720, 732, 915, 974, 976, 1098, 1220, 1461, 1464, 1830, 1948, 2196, 2435, 2440, 2745, 2922, 2928, 3660, 3896, 4383, 4392, 4870, 4880, 5490, 5844, 7305, 7320, 7792, 8766, 8784, 9740, 10980, 11688, 14610, 14640, 17532, 19480, 21915, 21960, 23376, 29220, 29707, 35064, 38960, 43830, 43920, 58440, 59414, 70128, 87660, 89121, 116880, 118828, 148535, 175320, 178242, 237656, 267363, 297070, 350640, 356484, 445605, 475312, 534726, 594140, 712968, 891210, 1069452, 1188280, 1336815, 1425936, 1782420, 2138904, 2376560, 2673630, 3564840, 4277808, 5347260, 7129680, 10694520, 21389040]

約数ペア:

[(1, 21389040), (2, 10694520), (3, 7129680), (4, 5347260), (5, 4277808), (6, 3564840), (8, 2673630), (9, 2376560), (10, 2138904), (12, 1782420), (15, 1425936), (16, 1336815), (18, 1188280), (20, 1069452), (24, 891210), (30, 712968), (36, 594140), (40, 534726), (45, 475312), (48, 445605), (60, 356484), (61, 350640), (72, 297070), (80, 267363), (90, 237656), (120, 178242), (122, 175320), (144, 148535), (180, 118828), (183, 116880), (240, 89121), (244, 87660), (305, 70128), (360, 59414), (366, 58440), (487, 43920), (488, 43830), (549, 38960), (610, 35064), (720, 29707), (732, 29220), (915, 23376), (974, 21960), (976, 21915), (1098, 19480), (1220, 17532), (1461, 14640), (1464, 14610), (1830, 11688), (1948, 10980), (2196, 9740), (2435, 8784), (2440, 8766), (2745, 7792), (2922, 7320), (2928, 7305), (3660, 5844), (3896, 5490), (4383, 4880), (4392, 4870)]