18910720

素因数分解:

$2^9\times 5^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:195

約数の個数: 80

約数和(自身を含む): 46403280

約数和(自身を除く): 27492560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 83, 89, 128, 160, 166, 178, 256, 320, 332, 356, 415, 445, 512, 640, 664, 712, 830, 890, 1280, 1328, 1424, 1660, 1780, 2560, 2656, 2848, 3320, 3560, 5312, 5696, 6640, 7120, 7387, 10624, 11392, 13280, 14240, 14774, 21248, 22784, 26560, 28480, 29548, 36935, 42496, 45568, 53120, 56960, 59096, 73870, 106240, 113920, 118192, 147740, 212480, 227840, 236384, 295480, 472768, 590960, 945536, 1181920, 1891072, 2363840, 3782144, 4727680, 9455360, 18910720]

約数ペア:

[(1, 18910720), (2, 9455360), (4, 4727680), (5, 3782144), (8, 2363840), (10, 1891072), (16, 1181920), (20, 945536), (32, 590960), (40, 472768), (64, 295480), (80, 236384), (83, 227840), (89, 212480), (128, 147740), (160, 118192), (166, 113920), (178, 106240), (256, 73870), (320, 59096), (332, 56960), (356, 53120), (415, 45568), (445, 42496), (512, 36935), (640, 29548), (664, 28480), (712, 26560), (830, 22784), (890, 21248), (1280, 14774), (1328, 14240), (1424, 13280), (1660, 11392), (1780, 10624), (2560, 7387), (2656, 7120), (2848, 6640), (3320, 5696), (3560, 5312)]