128199920

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1\times {\mathrm{173}}^1$

素因数の和:402

約数の個数: 80

約数和(自身を含む): 306810720

約数和(自身を除く): 178610800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 157, 173, 236, 295, 314, 346, 472, 590, 628, 692, 785, 865, 944, 1180, 1256, 1384, 1570, 1730, 2360, 2512, 2768, 3140, 3460, 4720, 6280, 6920, 9263, 10207, 12560, 13840, 18526, 20414, 27161, 37052, 40828, 46315, 51035, 54322, 74104, 81656, 92630, 102070, 108644, 135805, 148208, 163312, 185260, 204140, 217288, 271610, 370520, 408280, 434576, 543220, 741040, 816560, 1086440, 1602499, 2172880, 3204998, 6409996, 8012495, 12819992, 16024990, 25639984, 32049980, 64099960, 128199920]

約数ペア:

[(1, 128199920), (2, 64099960), (4, 32049980), (5, 25639984), (8, 16024990), (10, 12819992), (16, 8012495), (20, 6409996), (40, 3204998), (59, 2172880), (80, 1602499), (118, 1086440), (157, 816560), (173, 741040), (236, 543220), (295, 434576), (314, 408280), (346, 370520), (472, 271610), (590, 217288), (628, 204140), (692, 185260), (785, 163312), (865, 148208), (944, 135805), (1180, 108644), (1256, 102070), (1384, 92630), (1570, 81656), (1730, 74104), (2360, 54322), (2512, 51035), (2768, 46315), (3140, 40828), (3460, 37052), (4720, 27161), (6280, 20414), (6920, 18526), (9263, 13840), (10207, 12560)]