20388100

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{179}}^1$

素因数の和:277

約数の個数: 72

約数和(自身を含む): 47809440

約数和(自身を除く): 27421340

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 67, 68, 85, 100, 134, 170, 179, 268, 335, 340, 358, 425, 670, 716, 850, 895, 1139, 1340, 1675, 1700, 1790, 2278, 3043, 3350, 3580, 4475, 4556, 5695, 6086, 6700, 8950, 11390, 11993, 12172, 15215, 17900, 22780, 23986, 28475, 30430, 47972, 56950, 59965, 60860, 76075, 113900, 119930, 152150, 203881, 239860, 299825, 304300, 407762, 599650, 815524, 1019405, 1199300, 2038810, 4077620, 5097025, 10194050, 20388100]

約数ペア:

[(1, 20388100), (2, 10194050), (4, 5097025), (5, 4077620), (10, 2038810), (17, 1199300), (20, 1019405), (25, 815524), (34, 599650), (50, 407762), (67, 304300), (68, 299825), (85, 239860), (100, 203881), (134, 152150), (170, 119930), (179, 113900), (268, 76075), (335, 60860), (340, 59965), (358, 56950), (425, 47972), (670, 30430), (716, 28475), (850, 23986), (895, 22780), (1139, 17900), (1340, 15215), (1675, 12172), (1700, 11993), (1790, 11390), (2278, 8950), (3043, 6700), (3350, 6086), (3580, 5695), (4475, 4556)]