19964753408

素因数分解:

$2^9\times {\mathrm{89}}^1\times {\mathrm{438131}}^1$

素因数の和:438238

約数の個数: 40

約数和(自身を含む): 40338813240

約数和(自身を除く): 20374059832

約数列:

[1, 2, 4, 8, 16, 32, 64, 89, 128, 178, 256, 356, 512, 712, 1424, 2848, 5696, 11392, 22784, 45568, 438131, 876262, 1752524, 3505048, 7010096, 14020192, 28040384, 38993659, 56080768, 77987318, 112161536, 155974636, 224323072, 311949272, 623898544, 1247797088, 2495594176, 4991188352, 9982376704, 19964753408]

約数ペア:

[(1, 19964753408), (2, 9982376704), (4, 4991188352), (8, 2495594176), (16, 1247797088), (32, 623898544), (64, 311949272), (89, 224323072), (128, 155974636), (178, 112161536), (256, 77987318), (356, 56080768), (512, 38993659), (712, 28040384), (1424, 14020192), (2848, 7010096), (5696, 3505048), (11392, 1752524), (22784, 876262), (45568, 438131)]