20477440

素因数分解:

$2^9\times 5^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:463

約数の個数: 80

約数和(自身を含む): 51804720

約数和(自身を除く): 31327280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 421, 512, 608, 640, 760, 842, 1216, 1280, 1520, 1684, 2105, 2432, 2560, 3040, 3368, 4210, 4864, 6080, 6736, 7999, 8420, 9728, 12160, 13472, 15998, 16840, 24320, 26944, 31996, 33680, 39995, 48640, 53888, 63992, 67360, 79990, 107776, 127984, 134720, 159980, 215552, 255968, 269440, 319960, 511936, 538880, 639920, 1023872, 1077760, 1279840, 2047744, 2559680, 4095488, 5119360, 10238720, 20477440]

約数ペア:

[(1, 20477440), (2, 10238720), (4, 5119360), (5, 4095488), (8, 2559680), (10, 2047744), (16, 1279840), (19, 1077760), (20, 1023872), (32, 639920), (38, 538880), (40, 511936), (64, 319960), (76, 269440), (80, 255968), (95, 215552), (128, 159980), (152, 134720), (160, 127984), (190, 107776), (256, 79990), (304, 67360), (320, 63992), (380, 53888), (421, 48640), (512, 39995), (608, 33680), (640, 31996), (760, 26944), (842, 24320), (1216, 16840), (1280, 15998), (1520, 13472), (1684, 12160), (2105, 9728), (2432, 8420), (2560, 7999), (3040, 6736), (3368, 6080), (4210, 4864)]