20421291842

素因数分解:

$2^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{907}}^1\times {\mathrm{1427}}^1$

素因数の和:2380

約数の個数: 64

約数和(自身を含む): 37342771200

約数和(自身を除く): 16921479358

約数列:

[1, 2, 7, 14, 23, 46, 49, 98, 161, 322, 343, 686, 907, 1127, 1427, 1814, 2254, 2854, 6349, 7889, 9989, 12698, 15778, 19978, 20861, 32821, 41722, 44443, 65642, 69923, 88886, 139846, 146027, 229747, 292054, 311101, 459494, 489461, 622202, 978922, 1022189, 1294289, 1608229, 2044378, 2588578, 3216458, 7155323, 9060023, 11257603, 14310646, 18120046, 22515206, 29768647, 59537294, 63420161, 126840322, 208380529, 416761058, 443941127, 887882254, 1458663703, 2917327406, 10210645921, 20421291842]

約数ペア:

[(1, 20421291842), (2, 10210645921), (7, 2917327406), (14, 1458663703), (23, 887882254), (46, 443941127), (49, 416761058), (98, 208380529), (161, 126840322), (322, 63420161), (343, 59537294), (686, 29768647), (907, 22515206), (1127, 18120046), (1427, 14310646), (1814, 11257603), (2254, 9060023), (2854, 7155323), (6349, 3216458), (7889, 2588578), (9989, 2044378), (12698, 1608229), (15778, 1294289), (19978, 1022189), (20861, 978922), (32821, 622202), (41722, 489461), (44443, 459494), (65642, 311101), (69923, 292054), (88886, 229747), (139846, 146027)]