19934720

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{599}}^1$

素因数の和:635

約数の個数: 80

約数和(自身を含む): 51559200

約数和(自身を除く): 31624480

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 599, 640, 832, 1040, 1198, 1280, 1664, 2080, 2396, 2560, 2995, 3328, 4160, 4792, 5990, 6656, 7787, 8320, 9584, 11980, 15574, 16640, 19168, 23960, 31148, 33280, 38336, 38935, 47920, 62296, 76672, 77870, 95840, 124592, 153344, 155740, 191680, 249184, 306688, 311480, 383360, 498368, 622960, 766720, 996736, 1245920, 1533440, 1993472, 2491840, 3986944, 4983680, 9967360, 19934720]

約数ペア:

[(1, 19934720), (2, 9967360), (4, 4983680), (5, 3986944), (8, 2491840), (10, 1993472), (13, 1533440), (16, 1245920), (20, 996736), (26, 766720), (32, 622960), (40, 498368), (52, 383360), (64, 311480), (65, 306688), (80, 249184), (104, 191680), (128, 155740), (130, 153344), (160, 124592), (208, 95840), (256, 77870), (260, 76672), (320, 62296), (416, 47920), (512, 38935), (520, 38336), (599, 33280), (640, 31148), (832, 23960), (1040, 19168), (1198, 16640), (1280, 15574), (1664, 11980), (2080, 9584), (2396, 8320), (2560, 7787), (2995, 6656), (3328, 5990), (4160, 4792)]